feat: setup galera cluster member profile

- add eyaml support for role
- add /data volume for galera cluster members
- create profiles::selinux namespace for defining selinux configuration
  - create profiles::selinux::mysqld for managing specifics for mysqld
  - create profiles::selinux::setenforce to manage selinux mode
- parameterised options required in mysqld::server module
- add mariadb repo
- add additional facts for managing mysqld and galera

hieradata/roles/infra/sql/galera.yaml

@@ -0,0 +1,11 @@
+---
+profiles::sql::galera_member::cluster_name: galera01
+profiles::sql::galera_member::galera_master: prodinf01n29.main.unkin.net
+profiles::sql::galera_member::configure_firewall: false
+profiles::sql::galera_member::wsrep_sst_method: rsync
+profiles::sql::galera_member::galera_members_lookup: true
+profiles::sql::galera_member::galera_members_role: roles::infra::sql::galera
+profiles::sql::galera_member::datadir: /data/mariadb
+profiles::sql::galera_member::innodb_buffer_pool_size: 256M
+profiles::sql::galera_member::innodb_file_per_table: 1
+profiles::sql::galera_member::package_name: mariadb-galera-server