Remove clean up of push socket in publisher to fix race condition

The clean up was causing an inconsistency in the pull socket,
this will need some more refinement, but for now the problem is
fixed

salt/master.py

@@ -1676,7 +1676,6 @@ class ClearFuncs(object):
                 load['tgt'],
                 load.get('tgt_type', 'glob')
                 )
-        try:
         return {
             'enc': 'clear',
             'load': {
@@ -1684,9 +1683,3 @@ class ClearFuncs(object):
                 'minions': minions
             }
         }
-        finally:
-            if pub_sock.closed is False:
-                pub_sock.setsockopt(zmq.LINGER, 1)
-                pub_sock.close()
-            if context.closed is False:
-                context.term()