Fix unittest failure in radware lbaas driver

Issue greenthread.sleep(0) to switch greenthreads and wait
for vip to complete deletion

Change-Id: I46b0702b0df527965ecf94e334ed3327f408a05c
Closes-Bug: #1288312
BigSwitch: Fix rest call in consistency watchdog

Fixes the rest call in the consistency watchdog
in the BigSwitch plugin that was causing it to
raise an exception.

Closes-Bug: #1289138
Change-Id: Id4dff993426573be6984eb1e8f6ef2aabfff0779
Merge "Fix unittest failure in radware lbaas driver"
Merge "BigSwitch: Fix rest call in consistency watchdog"