Debugger: Client Service synchronization

Sends connect command after all initial commands have been sent.
This ensures that the initialization is complete before the start
of the debugging session.

Change-Id: I1903caa9c213fef4e6b40df89a352d80e350a46d
Reviewed-on: http://codereview.qt.nokia.com/3526
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Christiaan Janssen <christiaan.janssen@nokia.com>

src/plugins/debugger/qml/qscriptdebuggerclient.h

@@ -51,8 +51,8 @@ public:
     QScriptDebuggerClient(QmlJsDebugClient::QDeclarativeDebugConnection *client);
     ~QScriptDebuggerClient();
 
-    void connect();
-    void disconnect();
+    void startSession();
+    void endSession();
 
     void executeStep();
     void executeStepOut();