Share more code inside get_mon_nodes.
Share more code inside get_mon_nodes.

Only call search() in one place, just build different search strings
for Crowbar and non-Crowbar.

ceph/ceph-cookbook,nareiber/ceph-cookbook,nareiber/ceph-cookbook,klamontagne/ceph-cookbook,ncerny/ceph-cookbook,sandoracs/ceph-cookbook,tas50/ceph-cookbook,klamontagne/ceph-cookbook,sandoracs/ceph-cookbook,tas50/ceph-cookbook,osuosl-cookbooks/ceph-cookbook,osuosl-cookbooks/ceph-cookbook,nareiber/ceph-cookbook,sandoracs/ceph-cookbook,tas50/ceph-cookbook,ceph/ceph-cookbook,osuosl-cookbooks/ceph-cookbook,ncerny/ceph-cookbook,ceph/ceph-cookbook,ncerny/ceph-cookbook,klamontagne/ceph-cookbook