Try/catch to skip invalid JSON in dirtyDB

bin/dirty-db-cleaner.py

@@ -31,8 +31,11 @@ with open(dirtydb_input, 'r') as fd:
     print 'Reading %s' % dirtydb_input
     for line in fd:
         lines += 1
+        try:
             data = json.loads(line)
             dirtydb[data['key']] = line
+        except:
+            print("Skipping invalid JSON!")
         if lines % 10000 == 0:
             sys.stderr.write('.')
 print