Fix argument mismatch failure for neutron-check-nvp-config

Use sys.argv directly.

Fix bug #1243888

Change-Id: I9cb6ca841d004baf72dd68e44be673c361c2ed05
Fix TypeError: <MagicMock name='LinuxBridgeManager().local_ip'

This patch fixes an error that does not result in a test failure but
causes the following error to be logged in the test logs:

TypeError: <MagicMock name='LinuxBridgeManager().local_ip' id='666599248'>
is not JSON serializable

Related-Bug: #1234857

Change-Id: I65cdd997745d8b760031f8f32e3c10682ad2288e
Updated from global requirements

Change-Id: Ifbcffab245f7dee50f5a84489011e220a3f8fea8
Merge "Fix TypeError: <MagicMock name='LinuxBridgeManager().local_ip'"
Merge "Updated from global requirements"
Merge "Fix argument mismatch failure for neutron-check-nvp-config"