Wait for Standby post reboot for REST operation

The failure seen are intermittent and only showing up on barreleye.
We can't determine for sure safe check if the REST is not Busy when
the test action request are made. Even with this check we are not
fully gauranteed that REST server would not be busy, however it gives
a confidence that REST would have already completed initialization
and setup needed to reach a well define state post reboot to accept
new request.

Resolves openbmc/openbmc-test-automation#211

Change-Id: Idba43d2e9d0993a656583877a7c853bf1d5a7b58
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
2 files changed