Bazaar: set global Bazaar user ID when changed

This ID is automatically set when the user settings have been changed
and applied from the "Options" dialog. This calls 'bzr whoami' under
the hood

Merge-request: 275
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/vcsbase/vcsbaseclient.h

@@ -105,6 +105,8 @@ public:
 
     virtual QString findTopLevelForFile(const QFileInfo &file) const = 0;
 
+    const VCSBaseClientSettings &settings() const;
+
 signals:
     void parsedStatus(const QList<QPair<QString, QString> > &statusList);
     // Passes on changed signals from VCSJob to Control