Python: Initialize settings in the pimpl

Change-Id: I172136851c3002bf785d9b8f378c0cccc408e0e2
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/python/pythonplugin.cpp

@@ -39,6 +39,8 @@ public:
         {ProjectExplorer::Constants::NORMAL_RUN_MODE},
         {runConfigFactory.runConfigurationId()}
     };
+
+    PythonSettings settings;
 };
 
 PythonPlugin::PythonPlugin()
@@ -66,8 +68,6 @@ bool PythonPlugin::initialize(const QStringList &arguments, QString *errorMessag
 
     ProjectManager::registerProjectType<PythonProject>(PythonMimeType);
 
-    PythonSettings::init();
-
     return true;
 }