This updates the script for deploying ldap in the network policy
job to accept ingress traffic from prometheus pods.
This also updates the network policy test to account for return
values with more than one result when checking for a pod to use,
as well as selecting pods by application and component labels
instead of simply grepping for a name (as this could cause issues
with grepping for 'fluentd', when that could return both fluentd
and fluentd-exporter pods, for example)
Change-Id: I12a4029f574ea7d5b250709adef21b07d8cf0220
25e4e5662e