Force akka version 2.8

Also removes most akka dependencies from the common module. This is the
second attempt at fixing the memory leak thought to be caused by earlier
versions of akka

Author: afoerster

build.sbt

@@ -69,6 +69,7 @@ lazy val dependencies =
     val scalaTest         = "org.scalatest" %% "scalatest"                   % scalaTestVersion     % Test
     val scalaDockerTest   = "com.whisk"     %% "docker-testkit-scalatest"    % dockerTestKitVersion % Test
     val spotifyDockerTest = "com.whisk"     %% "docker-testkit-impl-spotify" % dockerTestKitVersion % Test
+    val slf4jLogging   = "org.slf4j"                  % "slf4j-log4j12"   % "1.7.5" % Test
 
     val kudu          = "org.apache.kudu" % "kudu-client"     % kuduVersion
     val kuduTestUtils = "org.apache.kudu" % "kudu-test-utils" % kuduVersion % Test
@@ -88,14 +89,15 @@ lazy val dependencies =
     val akkaHttp          = "com.typesafe.akka" %% "akka-http"            % akkaHttpVersion
     val akkaHttpSprayJson = "com.typesafe.akka" %% "akka-http-spray-json" % akkaHttpVersion
     val akkaCors          = "ch.megard"         %% "akka-http-cors"       % akkaCorsVersion
+    val akka              = "com.typesafe.akka" %% "akka-actor"           % akkaVersion
 
     val akkaTestKit  = "com.typesafe.akka" %% "akka-testkit"      % "2.4.20"        % Test
     val akkaHttpTest = "com.typesafe.akka" %% "akka-http-testkit" % akkaHttpVersion % Test
 
-    val solrj4 = "org.apache.solr" % "solr-solrj" % solrj4Version exclude ("org.slf4j", "*")
+    val solrj4    = "org.apache.solr" % "solr-solrj"          % solrj4Version exclude ("org.slf4j", "*")
     val solr4Test = "org.apache.solr" % "solr-test-framework" % solrj4Version % Test exclude ("org.slf4j", "*")
 
-    val solrj7 = "org.apache.solr" % "solr-solrj" % solrj7Version exclude ("org.slf4j", "*")
+    val solrj7    = "org.apache.solr" % "solr-solrj"          % solrj7Version exclude ("org.slf4j", "*")
     val solr7Test = "org.apache.solr" % "solr-test-framework" % solrj7Version % Test exclude ("org.slf4j", "*")
 
     val solr4 = Seq(solrj4, commonsCodec, solr4Test)
@@ -120,9 +122,10 @@ lazy val dependencies =
     val cats           = "org.typelevel" %% "cats-core"      % "1.1.0"
     val monix          = "io.monix"      %% "monix"          % monixVersion
 
-    val common = Seq(scalaLogging, scalaTest, logback, commonsLogging, cats)
-    val cli    = Seq(scallop, scalaYaml)
-    val all    = common ++ cli ++ Seq(scalaDockerTest, spotifyDockerTest)
+    val common = Seq(scalaLogging, scalaTest, slf4jLogging, commonsLogging, cats)
+
+    val cli = Seq(scallop, scalaYaml)
+    val all = common ++ cli ++ Seq(scalaDockerTest, spotifyDockerTest)
 
     val http = Seq(akkaHttp, akkaHttpSprayJson, akkaCors, akkaTestKit, akkaHttpTest)
 
@@ -169,7 +172,8 @@ lazy val `log-collector` = project
       dependencies.kudu,
       dependencies.kuduBinary,
       dependencies.kuduTestUtils
-    ) ++ dependencies.solr ++ dependencies.common
+    ) ++ dependencies.solr ++ dependencies.common,
+    dependencyOverrides += dependencies.akka
   )
   .dependsOn(common)
   .dependsOn(solrModule)
@@ -202,18 +206,14 @@ lazy val `alert-engine` = project
   .dependsOn(solrModule % "test->test")
 
 lazy val `common` = project
-  .settings(
-    name := "common",
-    settings,
-    libraryDependencies ++= dependencies.common ++ dependencies.http
-  )
+  .settings(name := "common", settings, libraryDependencies ++= dependencies.common :+ dependencies.akkaHttpSprayJson)
 
 lazy val `solr4` = project
   .settings(
     name := "solr4",
     settings,
     libraryDependencies ++= dependencies.common ++ dependencies.solr4 ++ Seq(
-      "org.scalatest"   %% "scalatest"          % scalaTestVersion
+      "org.scalatest" %% "scalatest" % scalaTestVersion
     )
   )
   .dependsOn(common)
@@ -223,7 +223,7 @@ lazy val solr7 = project
     name := "solr7",
     settings,
     libraryDependencies ++= (dependencies.common ++ dependencies.solr7 ++ Seq(
-      "org.scalatest"   %% "scalatest"          % scalaTestVersion
+      "org.scalatest" %% "scalatest" % scalaTestVersion
     ))
   )
   .dependsOn(common)
@@ -239,25 +239,26 @@ lazy val `log-example` = project
   .dependsOn(`log-appender`)
 
 // Library versions
-val logbackVersion            = "1.2.3"
-val scalaLoggingVersion       = "3.7.2"
-val scallopVersion            = "3.1.5"
-val scalaYamlVersion          = "0.4.0"
-val scalaTestVersion          = "3.0.8"
-val dockerTestKitVersion      = "0.9.5"
-val solrj4Version             = "4.10.3-cdh5.12.1"
-val solrj7Version             = "7.4.0-cdh6.1.1"
-val akkaHttpVersion           = "10.0.15"
-val akkaCorsVersion           = "0.2.2"
-val sprayJsonVersion          = "1.3.5"
-val sparkVersion              = "2.2.0.cloudera1"
-val log4jVersion              = "1.2.17"
-val httpClientVersion         = "4.5.5"
-val jacksonVersion            = "2.9.4"
-val junitVersion              = "4.12"
-val javaMailVersion           = "1.4"
-val mockitoVersion            = "1.10.19"
-val powerMockVersion          = "1.6.6"
-val monixVersion              = "2.3.3"
-val kuduVersion               = "1.10.0"
-val catsCoreVersion           = "1.6.0"
+val logbackVersion       = "1.2.3"
+val scalaLoggingVersion  = "3.7.2"
+val scallopVersion       = "3.1.5"
+val scalaYamlVersion     = "0.4.0"
+val scalaTestVersion     = "3.0.8"
+val dockerTestKitVersion = "0.9.5"
+val solrj4Version        = "4.10.3-cdh5.12.1"
+val solrj7Version        = "7.4.0-cdh6.1.1"
+val akkaVersion          = "2.5.8"
+val akkaHttpVersion      = "10.0.15"
+val akkaCorsVersion      = "0.2.2"
+val sprayJsonVersion     = "1.3.5"
+val sparkVersion         = "2.2.0.cloudera1"
+val log4jVersion         = "1.2.17"
+val httpClientVersion    = "4.5.5"
+val jacksonVersion       = "2.9.4"
+val junitVersion         = "4.12"
+val javaMailVersion      = "1.4"
+val mockitoVersion       = "1.10.19"
+val powerMockVersion     = "1.6.6"
+val monixVersion         = "2.3.3"
+val kuduVersion          = "1.10.0"
+val catsCoreVersion      = "1.6.0"