GA remove district from vote names

This fixes the naming issue in ga noted in openstates#1397. This fixes openstates#1360.

openstates/ga/bills.py

@@ -190,7 +190,8 @@ def scrape(self, session, chambers):
                             m = methods[how]
                         except KeyError:
                             m = vote.other
-                        m(whom['Name'])
+                        last_name, district = whom['Name'].split(', ')
+                        m(last_name.strip())
 
                     bill.add_vote(vote)