Test file yml formatting

Author: JvE

tests/centos-7-test.yml

@@ -1,15 +1,15 @@
 ---
 - hosts: all
-vars:
-mysql_packages:
-- mariadb
-- mariadb-server
-- mariadb-libs
-- MySQL-python
-- perl-DBD-MySQL
-mysql_daemon: mariadb
-mysql_log_error: /var/log/mariadb/mariadb.log
-mysql_syslog_tag: mariadb
-mysql_pid_file: /var/run/mariadb/mariadb.pid
-roles:
-- role_under_test
+  vars:
+    mysql_packages:
+      - mariadb
+      - mariadb-server
+      - mariadb-libs
+      - MySQL-python
+      - perl-DBD-MySQL
+    mysql_daemon: mariadb
+    mysql_log_error: /var/log/mariadb/mariadb.log
+    mysql_syslog_tag: mariadb
+    mysql_pid_file: /var/run/mariadb/mariadb.pid
+  roles:
+    - role_under_test