TT#54853 Switch dependency on mariadb-client-10.1 towards mariadb-client

Current Debian/buster provides mariadb-client-10.3.
There's no need to depend on a specific version,
as there's a metapackage depending on the latest version:

| % apt-cache show mariadb-client | grep Depends
| Depends: mariadb-client-10.3 (>= 1:10.3.13-1)

Change-Id: Ib13bbc7e004f9eb7f233235a362415c698e789b5

debian/control

@@ -299,7 +299,7 @@ Depends:
  mariadb-client,
  mariadb-server,
  monit,
- mytop | mariadb-client-10.1,
+ mytop | mariadb-client,
  net-tools,
  ngcp-asterisk-voicemail-odbcstorage,
  ngcp-backup-tools-pro,
@@ -397,7 +397,7 @@ Depends:
  lvm2,
  mariadb-client,
  mariadb-server,
- mytop | mariadb-client-10.1,
+ mytop | mariadb-client,
  net-tools,
  ngcp-asterisk-voicemail-odbcstorage,
  ngcp-billing-tools,
@@ -490,7 +490,7 @@ Depends:
  mariadb-client,
  mariadb-server,
  monit,
- mytop | mariadb-client-10.1,
+ mytop | mariadb-client,
  net-tools,
  ngcp-asterisk-voicemail-odbcstorage,
  ngcp-backup-tools-pro,