Move antlr3 from the front to the back of sys.path
Move antlr3 from the front to the back of sys.path

Adding antlr3 to the front of sys.path causes confusion for subsequent
imports.  I ran into a problem where "import extras" imported something from
the antlr3 directory instead of site-packages.  Antlr3 should be at the back
of the sys.path.

Change-Id: I03c4f723236c1b99759fa9d03f6296f4e49f98db

ekcs/congress,ekcs/congress,ramineni/my_congress,ramineni/my_congress,ekcs/congress,ramineni/my_congress,openstack/congress,openstack/congress,ekcs/congress,ramineni/my_congress