Log overwriting of metadata files

Gives more info for cases like #2641

couchpotato/core/plugins/base.py

@@ -97,6 +97,9 @@ class Plugin(object):
 
         self.makeDir(os.path.dirname(path))
 
+        if os.path.exists(path):
+            log.info('%s already exists, overwriting file with new version', path)
+
         try:
             f = open(path, 'w+' if not binary else 'w+b')
             f.write(content)