Added null check

Author: tmatveye-tibco

src/main/java/com/jaspersoft/jasperserver/jaxrs/client/core/JerseyRequest.java

@@ -136,7 +136,10 @@ public JerseyRequest<ResponseType> setPath(String path) {
 
     @Override
     public OperationResult<ResponseType> get() throws JSClientWebException {
-        Invocation.Builder request = buildRequest().acceptLanguage(userLocale);
+        Invocation.Builder request = buildRequest();
+        if (userLocale != null) {
+            request.acceptLanguage(userLocale);
+        }
         return executeRequest(GET, request);
     }
 
@@ -148,13 +151,19 @@ public OperationResult<ResponseType> delete() throws JSClientWebException {
 
     @Override
     public OperationResult<ResponseType> put(Object entity) throws JSClientWebException {
-        Invocation.Builder request = buildRequest().acceptLanguage(userLocale);
+        Invocation.Builder request = buildRequest();
+        if (userLocale != null) {
+            request.acceptLanguage(userLocale);
+        }
         return executeRequest(PUT, request, entity);
     }
 
     @Override
     public OperationResult<ResponseType> post(Object entity) throws JSClientWebException {
-        Invocation.Builder request = buildRequest().acceptLanguage(userLocale);
+        Invocation.Builder request = buildRequest();
+        if (userLocale != null) {
+            request.acceptLanguage(userLocale);
+        }
         return executeRequest(POST, request, entity);
     }