Clustercheck healthcheck with socat and ipv6
Clustercheck healthcheck with socat and ipv6

When clustercheck uses socat and IPv6, the healthcheck
has to wrap the service IP in brackets for the call
to succeed.

Change-Id: I61da4f85ccf88f0287886334c8a9f43e3be8ef7e
Closes-Bug: #1983266

openstack/tripleo-common,openstack/tripleo-common