updated connection.py to have the same interface for exec_command on both…

updated connection.py to have the same interface for exec_command on both LocalConnection and ParamikoConnection classes

lib/ansible/connection.py

@@ -188,7 +188,7 @@ class LocalConnection(object):
 
         return self
 
-    def exec_command(self, cmd, tmp_path, sudoable=False):
+    def exec_command(self, cmd, tmp_path,sudo_user,sudoable=False):
         ''' run a command on the local host '''
         if self.runner.sudo and sudoable:
             cmd = "sudo -s %s" % cmd