[sys-cluster/galera] Revbump to fix issues report in Bug 466706 Comment 14

Package-Manager: portage-2.1.12.2
[mariadb-galera] Clean up QA warning in metadata
[dev-db/mysql] Version bump to 5.6.13.  Failing test(s): rpl.rpl_spec_variables similar to bug 473002

Package-Manager: portage-2.1.12.2
[dev-db/mysql] Trim old

Package-Manager: portage-2.2.1
[dev-db/mariadb] Trim old

Package-Manager: portage-2.2.1
[dev-db/mysql] Remove testing repo from 5.6.13
Merge remote-tracking branch 'upstream/master'
update mysql eclass to parse percona server version from ebuild filename
update percona server to 5.5.33.31.1 & 5.6.13.60.5