Vcs: Introduce VcsBaseClientImpl

Introduce VcsBaseClientImpl class that is a base for both GitClient
and VcsBaseClient.

The idea is to slowly move code from VcsBaseClient into VcsBaseClientImpl
and reuse that in GitClient. Ideally GitClient would become a full
VcsBaseClient at some point, but let's see how far we can get with this
conversion process:-)

Change-Id: I2e63ba0dcf8a61128d5abf7c1453625e1b9f4e7e
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/gitclient.h

@@ -35,6 +35,7 @@
 #include "commitdata.h"
 
 #include <coreplugin/editormanager/ieditor.h>
+#include <vcsbase/vcsbaseclient.h>
 
 #include <utils/fileutils.h>
 
@@ -101,7 +102,7 @@ public:
 
 typedef QMap<QString, SubmoduleData> SubmoduleDataMap;
 
-class GitClient : public QObject
+class GitClient : public VcsBase::VcsBaseClientImpl
 {
     Q_OBJECT
 

src/plugins/vcsbase/vcsbaseclient.h

@@ -62,7 +62,14 @@ class VcsJob;
 class VcsBaseClientPrivate;
 class VcsBaseEditorParameterWidget;
 
-class VCSBASE_EXPORT VcsBaseClient : public QObject
+class VCSBASE_EXPORT VcsBaseClientImpl : public QObject
+{
+    Q_OBJECT
+
+public:
+};
+
+class VCSBASE_EXPORT VcsBaseClient : public VcsBaseClientImpl
 {
     Q_OBJECT