Fix the reviewed changes report from Gerrit

Omit owned CLs from the reviewed changes report. All owned CLs appear as
if the owner is a reviewer too, but it doesn't make sense to include
them in this report.

did/plugins/gerrit.py

@@ -314,7 +314,7 @@ def fetch(self):
         self.stats = []
         reviewer = self.user.login
         tickets = GerritUnit.fetch(
-            self, 'reviewer:{0}+is:closed&q=reviewer:{0}+is:open'.format(
+            self, 'reviewer:{0}+-owner:{0}'.format(
                 self.user.login),
             '', limit_since=True)
         for tck in tickets: