BZ #1174955 - retry adding galera resource if needed

https://bugzilla.redhat.com/show_bug.cgi?id=1174955

If at first you don't succeed!
BZ #1159390 - Allow open_files_limit & max_connections to be set for galera.

https://bugzilla.redhat.com/show_bug.cgi?id=1159390

They were already being set, but were not params a user could alter.  This patch
makes it so they are.
BZ #1173730 - add default type for new cluster network params.

https://bugzilla.redhat.com/show_bug.cgi?id=1173730

If these are not set, when using ofi installer, the correct datatype will not be
set for the new pcmk_ params (string instead of array).
Merge pull request #435 from cwolferh/bz1174955_retry_adding_galera_resource_if_needed

BZ #1174955 - retry adding galera resource if needed
BZ #1167414 - rabbitmq tcp keepalive

https://bugzilla.redhat.com/show_bug.cgi?id=1167414

Set tcp_listen_options in /etc/rabbitmq/rabbitmq.config
Merge pull request #440 from cwolferh/bz1167414_rabbit_tcp_keepalive

BZ #1167414 - rabbitmq tcp keepalive
Merge pull request #439 from jguiditta/BZ#1173730-add-seeds-change

BZ #1173730 - add default type for new cluster network params.
Merge pull request #438 from jguiditta/BZ1159390-enable-more-galera-overrides

BZ #1159390 - Allow open_files_limit & max_connections to be set for gal...