Fixes unncessary client context creation per proxy

fixes hazelcast#10117

hazelcast-client/src/main/java/com/hazelcast/client/spi/ProxyManager.java

@@ -118,6 +118,7 @@ public final class ProxyManager {
     private final ConcurrentMap<String, ClientProxyFactory> proxyFactories = new ConcurrentHashMap<String, ClientProxyFactory>();
     private final ConcurrentMap<ObjectNamespace, ClientProxyFuture> proxies
             = new ConcurrentHashMap<ObjectNamespace, ClientProxyFuture>();
+    private final ClientContext context;
 
     private final ListenerMessageCodec distributedObjectListenerCodec = new ListenerMessageCodec() {
         @Override
@@ -151,6 +152,7 @@ public ProxyManager(HazelcastClientInstanceImpl client) {
                 }
             }
         }
+        context = new ClientContext(client, this);
     }
 
     public void init(ClientConfig config) {
@@ -345,7 +347,6 @@ private void initialize(ClientProxy clientProxy) throws Exception {
         final Connection connection = getTargetOrOwnerConnection(initializationTarget);
         final ClientMessage clientMessage = ClientCreateProxyCodec.encodeRequest(clientProxy.getDistributedObjectName(),
                 clientProxy.getServiceName(), initializationTarget);
-        final ClientContext context = new ClientContext(client, this);
         new ClientInvocation(client, clientMessage, connection).invoke().get();
         clientProxy.setContext(context);
         clientProxy.onInitialize();