Fix MariaDB bootstrap issues on CentOS

Those issues intermittently show up in various branches,
in all cases it's wrong path used to resolveip binary.
Similar to the recent kolla-ansible-ubuntu-source job failures.

Change-Id: I8cce42b60897e4ceb8d3b0bd5181fda88b10c2b8

ansible/roles/mariadb/templates/galera.cnf.j2

@@ -8,9 +8,7 @@ default-character-set=utf8
 default-character-set=utf8
 
 [mysqld]
-{% if kolla_base_distro in ['debian', 'ubuntu'] %}
 basedir=/usr
-{% endif %}
 bind-address={{ api_interface_address }}
 port={{ mariadb_port }}