Fix rabbitmq-server selinux labeling

/mnt/state/var/lib/rabbitmq should be labeled as rabbitmq_var_lib_t
and not var_lib_t.
/mnt/state/var/log/rabbitmq should be labeled as rabbitmq_var_log_t
and not var_log_t.

Create /mnt/state/var/log/rabbitmq directory in pre-configure.d
so that it can be labeled before rabbitmq-server is started.

Change-Id: Ifaee9755a58c514003e1c35e73f7b9a91854046f
Merge "Fix rabbitmq-server selinux labeling"