Support Llama HA by cycling through a list of configured Llama hostports.

Change-Id: I471388f468254598347fdf605669b0c0af0f7a15
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2707
Reviewed-by: Alex Behm <alex.behm@cloudera.com>
Tested-by: jenkins
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2760