Instead of evaluating same condition of my_ip in multiple places across
the role this patch suggests doing this once in vars and using the
resulting variable afterwards.
This not only reduce amount of evaluations made throughout the role runtime,
but also solves possible corner cases where some syntax may go off.
Closes-Bug: #2052884
Change-Id: I454b53713ecacf844ac14f77b6d1e1adc1322c0e
b78e8a68ea