fixing the build error

Author: Sophia Tevosyan

azurefunctions/src/main/java/com/microsoft/durabletask/azurefunctions/DurableClientContext.java

@@ -61,7 +61,7 @@ public DurableTaskClient getClient() {
             throw new IllegalStateException("The client context RPC base URL was invalid!", ex);
         }
 
-        this.client = DurableTaskGrpcClientFactory.getClient(rpcURL.getPort());
+        this.client = DurableTaskGrpcClientFactory.getClient(rpcURL.getPort(), null);
         return this.client;
     }
 

client/src/main/java/com/microsoft/durabletask/DurableTaskGrpcClient.java

@@ -61,9 +61,9 @@ public final class DurableTaskGrpcClient extends DurableTaskClient {
         this.sidecarClient = TaskHubSidecarServiceGrpc.newBlockingStub(sidecarGrpcChannel);
     }
 
-    DurableTaskGrpcClient(int port) {
+    DurableTaskGrpcClient(int port, String defaultVersion) {
         this.dataConverter = new JacksonDataConverter();
-        this.defaultVersion = null;
+        this.defaultVersion = defaultVersion;
 
         // Need to keep track of this channel so we can dispose it on close()
         this.managedSidecarChannel = ManagedChannelBuilder

client/src/main/java/com/microsoft/durabletask/DurableTaskGrpcClientFactory.java

@@ -9,7 +9,7 @@
 public final class DurableTaskGrpcClientFactory {
     private static final ConcurrentMap<Integer, DurableTaskGrpcClient> portToClientMap = new ConcurrentHashMap<>();
 
-    public static DurableTaskClient getClient(int port) {
+    public static DurableTaskClient getClient(int port, String defaultVersion) {
         return portToClientMap.computeIfAbsent(port, DurableTaskGrpcClient::new);
     }
 }