[kea-packaging#8] hammer: stop mariadb before setup

Attempt to fix `start-stop-daemon: /usr/bin/mysqld_safe is already running`

Author: andrei-pavel

hammer.py

@@ -1370,17 +1370,9 @@ def _configure_mysql(system, revision, features):
     elif system == 'alpine':
         execute('sudo sed -i "/^skip-networking$/d" /etc/my.cnf.d/mariadb-server.cnf')
         execute('sudo rc-update add mariadb')
-        execute('sudo /etc/init.d/mariadb setup', raise_error=False)
-
-        # Wait for setup command to complete.
-        for i in range(10):
-            exit_code = execute('sudo pidof mysqld_safe', raise_error=False)
-            if exit_code != 0:
-                # Process exited or there was no process to begin with.
-                break
-            time.sleep(1)
-
-        execute('sudo /etc/init.d/mariadb restart')
+        execute('sudo rc-service mariadb stop')
+        execute('sudo rc-service mariadb setup')
+        execute('sudo rc-service mariadb restart')
 
     cmd = "echo 'DROP DATABASE IF EXISTS keatest;' | sudo mysql -u root"
     execute(cmd)