MT#22031 change from mysql to mariadb

- install mariadb-client and mariadb-server by default
      instead of mysql

Change-Id: I6ca09d9b794f063f261d050dbbaed1864c220e85

debian/control

@@ -259,8 +259,8 @@ Depends:
  linux-headers-amd64,
  linux-image-amd64,
  monit,
- mysql-client,
- mysql-server,
+ mariadb-client,
+ mariadb-server,
  ngcp-api-tools,
  ngcp-asterisk-voicemail-odbcstorage,
  ngcp-backup-tools,
@@ -329,8 +329,8 @@ Depends:
  bsd-mailx | mailx,
  bzip2,
  kannel,
- mysql-client,
- mysql-server,
+ mariadb-client,
+ mariadb-server,
  ngcp-api-tools,
  ngcp-asterisk-voicemail-odbcstorage,
  ngcp-billing-tools,
@@ -397,8 +397,8 @@ Depends:
  linux-headers-amd64,
  linux-image-amd64,
  monit,
- mysql-client,
- mysql-server,
+ mariadb-client,
+ mariadb-server,
  ngcp-api-tools,
  ngcp-asterisk-voicemail-odbcstorage,
  ngcp-backup-tools,