BZ#1047653 Cinder LVM setup broken

Accept gluster backend parameters into lvm_cinder.pp and make sure
that we use str2bool function when testing parameters that are
"boolean strings".

(cherry picked from commit 2a277cf0ab16ce4ae61c8f3f5f996f14a7adf425)
BZ #1053729 - Foreman controller params should end with _host instead of _ip.

https://bugzilla.redhat.com/show_bug.cgi?id=1053729

Rename controller_pub_ip and controller_priv_ip Foreman Host Group
parameters to more agnostic controller_pub_host or
controller_priv_host-- more agnostic because the user may enter a
hostname or an IP address for those values.

(cherry picked from commit de4323082340e4b5476344abbf387b4d11c49f4f)