CLOUDSTACK-7436: Fix automation test on RvR status detection

Everytime when checking the RvR status, you must wait some time for RvR to
update it's status. The polling thread would update the status only every 30
seconds by default.
CLOUDSTACK-8018: Improve code quality - test_redundant_router.py

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>