[Plugin Installer] Only test not loaded Python plugins when (re)build…

…ing metadata registry. Loaded plugins prove they are ok just being loaded. It prevents possible bugs when already loaded plugin is imported again.

python/pyplugin_installer/installer_data.py

@@ -687,7 +687,8 @@ def getAllInstalled(self, testLoad=True):
       for key in pluginDir.entryList():
         key = unicode(key)
         if not key in [".",".."]:
-          self.localCache[key] = self.getInstalledPlugin(key, readOnly=True, testLoad=False)
+          # only test those not yet loaded. Others proved they're o.k.
+          self.localCache[key] = self.getInstalledPlugin(key, readOnly=True, testLoad=testLoad and not qgis.utils.plugins.has_key(key))
     except:
       # return QCoreApplication.translate("QgsPluginInstaller","Couldn't open the system plugin directory")
       pass # it's not necessary to stop due to this error
@@ -703,7 +704,8 @@ def getAllInstalled(self, testLoad=True):
     for key in pluginDir.entryList():
       key = unicode(key)
       if not key in [".",".."]:
-        plugin = self.getInstalledPlugin(key, readOnly=False, testLoad=testLoad)
+        # only test those not yet loaded. Others proved they're o.k.
+        plugin = self.getInstalledPlugin(key, readOnly=False, testLoad=testLoad and not qgis.utils.plugins.has_key(key))
         if key in self.localCache.keys() and compareVersions(self.localCache[key]["version_installed"],plugin["version_installed"]) == 1:
           # An obsolete plugin in the "user" location is masking a newer one in the "system" location!
           self.obsoletePlugins += [key]