use new discard() method of EntropyCacher

libraries/entropy/client/interfaces/cache.py

@@ -124,7 +124,7 @@ class CacheMixin:
                 )
 
     def clear_dump_cache(self, dump_name, skip = []):
-        self.Cacher.sync(wait = True)
+        self.Cacher.discard()
         self.SystemSettings._clear_dump_cache(dump_name, skip = skip)
 
     def update_ugc_cache(self, repository):

libraries/entropy/client/interfaces/methods.py

@@ -1160,7 +1160,7 @@ class MiscMixin:
         @type branch basestring
         @return None
         """
-        self.Cacher.sync(wait = True)
+        self.Cacher.discard()
         self.Cacher.stop()
         self.purge_cache(showProgress = False)
         self.close_all_repositories()
@@ -1522,7 +1522,7 @@ class MatchMixin:
         if not callable(f):
             raise IncorrectParameter('IncorrectParameter: %s: %s' % (_("not a valid method"),method,) )
 
-        self.Cacher.sync(wait = True)
+        self.Cacher.discard()
         done = f(match, dry_run)
         if done and not dry_run:
             self.SystemSettings.clear()

libraries/entropy/core.py

@@ -1262,7 +1262,7 @@ class SystemSettings(Singleton):
         """
         Internal method, go away!
         """
-        self.__cacher.sync(wait = True)
+        self.__cacher.discard()
         self._clear_dump_cache(etpCache['world_available'])
         self._clear_dump_cache(etpCache['world_update'])
         self._clear_dump_cache(etpCache['check_package_update'])