Revert Some Dependencies

The latest Netty dependency supplied by Spring Boot contains a regression that causes
terminal problems when we upload applications in some circumstances. This commit reverts
back to the last safe version (for us) of our Spring Boot dependency.

Signed-off-by: Paul Harris <harrisp@vmware.com>

Author: twoseat

pom.xml

@@ -59,7 +59,7 @@
 
     <properties>
         <commons-compress.version>1.20</commons-compress.version>
-        <dependencies.version>2.1.16.RELEASE</dependencies.version>
+        <dependencies.version>2.1.15.RELEASE</dependencies.version>
         <evo-inflector.version>1.2.2</evo-inflector.version>
         <immutables.version>2.8.8</immutables.version>
         <java-semver.version>0.9.0</java-semver.version>