CORD-706: Worked around an ssh/ssh proxy bug that would cause ansible's ssh to remember a failed DNS lookup, and prevent the proxy command from working.
CORD-706: Worked around an ssh/ssh proxy bug that would cause ansible's
ssh to remember a failed DNS lookup, and prevent the proxy command from
working.

Change-Id: Icc2d24532a6fc09bea214ed4f9266e7f9931ecc6

opencord/xos,opencord/xos,open-cloud/xos,open-cloud/xos,opencord/xos,open-cloud/xos