DeletePasswordJob: Start the WriteJob immediatly

We want that if one delete, then read the password directly after,
it do not reuse the deleted password.

keychain.cpp

@@ -157,7 +157,7 @@ void DeletePasswordJob::doStart() {
     job->setInsecureFallback(true);
     job->setSettings(settings());
     job->setKey( d->key );
-    job->start();
+    job->doStart();
 }
 
 QString DeletePasswordJob::key() const {

keychain.h

@@ -117,6 +117,7 @@ protected:
 private:
     friend class QKeychain::JobExecutor;
     friend class QKeychain::WritePasswordJobPrivate;
+    friend class DeletePasswordJob;
     WritePasswordJobPrivate* const d;
 };