fixes #666 move lockkey path location to cache_dir to ensure this path is always writable for rhodecode server

rhodecode/lib/celerylib/__init__.py

@@ -93,7 +93,7 b' def __get_lockkey(func, *fargs, **fkwarg'
 def locked_task(func):
     def __wrapper(func, *fargs, **fkwargs):
         lockkey = __get_lockkey(func, *fargs, **fkwargs)
-        lockkey_path = config['here']
+        lockkey_path = config['app_conf']['cache_dir']
 
         log.info('running task with lockkey %s' % lockkey)
         try:

rhodecode/lib/celerylib/tasks.py

@@ -92,7 +92,7 b' def get_commits_stats(repo_name, ts_min_'
     DBS = get_session()
     lockkey = __get_lockkey('get_commits_stats', repo_name, ts_min_y,
                             ts_max_y)
-    lockkey_path = config['here']
+    lockkey_path = config['app_conf']['cache_dir']
 
     log.info('running task with lockkey %s' % lockkey)