make username and password in-out parameters in QgsCredentials bindings

Author: alexbruy

python/core/qgscredentials.sip

@@ -8,15 +8,15 @@ class QgsCredentials
     //! virtual destructor
     virtual ~QgsCredentials();
 
-    bool get( QString realm, QString &username, QString &password, QString message = QString::null );
+    bool get( QString realm, QString &username /In,Out/, QString &password /In,Out/, QString message = QString::null );
     void put( QString realm, QString username, QString password );
 
     //! retrieves instance
     static QgsCredentials *instance();
 
   protected:
     //! request a password
-    virtual bool request( QString realm, QString &username, QString &password, QString message = QString::null ) = 0;
+    virtual bool request( QString realm, QString &username /In,Out/, QString &password /In,Out/, QString message = QString::null ) = 0;
 
     //! register instance
     void setInstance( QgsCredentials *theInstance );
@@ -37,5 +37,5 @@ class QgsCredentialsConsole : QObject, QgsCredentials
     void destroyed();
 
   protected:
-    virtual bool request( QString realm, QString &username, QString &password, QString message = QString::null );
+    virtual bool request( QString realm, QString &username /In,Out/, QString &password /In,Out/, QString message = QString::null );
 };

python/gui/qgscredentialdialog.sip

@@ -12,5 +12,5 @@ class QgsCredentialDialog : QDialog, QgsCredentials
     ~QgsCredentialDialog();
 
   protected:
-    virtual bool request( QString realm, QString &username, QString &password, QString message = QString::null );
+    virtual bool request( QString realm, QString &username /In,Out/, QString &password /In,Out/, QString message = QString::null );
 };