Skip keepalived_respawns test

Skip keepalived_respawns test

keepalived fails to respawn after crash for > 1.2.11 version.

When keepalived starts, it spawns vrrp thread to monitor vrrp forked
process. It also creates a vrrp pid file. When the process is killed, and
it's restarted, the the new keepalived process runs with -P, so
when we validate whether we are already running,  we check vrrp pid file.
Since we never clean up the file before starting the process, and the process
dies without a chance to clean up the file as part of its signal
handler, respawn never works.

keepalived_respawns test should be skipped until bug is resolved.
See also: https://bugzilla.redhat.com/show_bug.cgi?id=1286729

Change-Id: Ic111573e0cd5ad5bfe70b0f38ec0203c10d52e34
Related-Bug: #1511311