BZ #1049121 - HA Mysql A/P allow mount options.

https://bugzilla.redhat.com/show_bug.cgi?id=1083781#c22

Add paramater $mysql_shared_storage_options to the HA Mysql Node
hostgroup, to allow the user to specify whatever mount options they
want.
BZ #1049121 - HA Mysql A/P mysql.sock trickery

https://bugzilla.redhat.com/show_bug.cgi?id=1049121#c22

Create a symbolic link to mysql.sock from shared storage.  This is
necessary for selinux reasons.  See the bugzilla comment for full
details.
Merge pull request #162 from cwolferh/hamysql_selinux_fixes

Hamysql selinux fixes