Fix MariaDB image build

The error in MariaDB installation during the guest image building:

```
apt-get -y install socat percona-xtrabackup
percona-xtrabackup : Depends: libcurl4 (>= 7.16.3) but it is not installable
                     Depends: libgcrypt20 (>= 1.8.0) but 1.6.5-2ubuntu0.5 is to be installed
                     Depends: libssl1.1 (>= 1.1.0) but it is not installable
E: Unable to correct problems, you have held broken packages.
```

This patch fixes the issue based on the process described in
https://mariadb.com/kb/en/library/installing-mariadb-deb-files

Change-Id: I368bddabffcc0f11f7181b3a33be1f213f0bdaba

integration/scripts/files/elements/ubuntu-mariadb/pre-install.d/10-percona-apt-key

@@ -1,26 +0,0 @@
-#!/bin/bash
-
-# CONTEXT: GUEST during PRE-CONSTRUCTION as ROOT
-# PURPOSE: Setup apt-repo list so that we can connect to Percona's repo
-
-set -e
-set -o xtrace
-
-[ -n "${GUEST_USERNAME}" ] || die "GUEST_USERNAME needs to be set to the user for the guest image"
-[ -n "${RELEASE}" ] || die "RELEASE must be set to either Trusty or Precise"
-
-# Add Percona GPG key
-mkdir -p /home/${GUEST_USERNAME}/.gnupg
-
-get_key_robust 1C4CBDCDCD2EFD2A
-get_key_robust 9334A25F8507EFA5
-
-# Add Percona repo
-# Creates the Percona sources list
-cat <<EOL > /etc/apt/sources.list.d/percona.list
-deb http://repo.percona.com/apt $RELEASE main
-deb-src http://repo.percona.com/apt $RELEASE main
-EOL
-
-# Force an update
-apt-get -y update

integration/scripts/files/elements/ubuntu-xenial-mariadb/install.d/30-mariadb

@@ -2,40 +2,36 @@
 
 # CONTEXT: GUEST during CONSTRUCTION as ROOT
 # PURPOSE: Install controller base required packages
+# Refer to https://mariadb.com/kb/en/library/installing-mariadb-deb-files
 
 set -e
 set -o xtrace
 
 export DEBIAN_FRONTEND=noninteractive
 
-# NOTE(vkmc): Using MariaDB repositories is required
+# These GPG key IDs are used to fetch keys from a keyserver on Ubuntu & Debian
-# https://mariadb.com/kb/en/mariadb/installing-mariadb-deb-files/
+apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xF1656F24C74CD1D8
-apt-get -y install software-properties-common
+curl -sS https://downloads.mariadb.com/MariaDB/mariadb_repo_setup |
+  bash -s -- --mariadb-server-version="mariadb-10.4" --skip-key-import --skip-maxscale
 
-get_key_robust 0xF1656F24C74CD1D8
+# NOTE(lxkong): Refer to https://www.percona.com/doc/percona-xtrabackup/2.4/installation/apt_repo.html
+wget https://repo.percona.com/apt/percona-release_latest.$(lsb_release -sc)_all.deb
+dpkg -i percona-release_latest.$(lsb_release -sc)_all.deb
 
-add-apt-repository 'deb http://ftp.osuosl.org/pub/mariadb/repo/10.1/ubuntu xenial main'
+apt-get update
 
-# Pin MariaDB repository
+# Disable password prompt
-sudo echo -e "Package: *\nPin: origin ftp.osuosl.org\nPin-Priority: 1000" > /etc/apt/preferences.d/mariadb.pref
+debconf-set-selections <<< "mariadb-server mysql-server/root_password password ''"
+debconf-set-selections <<< "mariadb-server mysql-server/root_password_again password ''"
 
-apt-get -y update
+apt-get install -y --allow-unauthenticated mariadb-server mariadb-client galera-4 libmariadb3 mariadb-backup mariadb-common percona-xtrabackup-24
-apt-get -y install socat percona-xtrabackup
-apt-get -y install libmariadbclient18 mariadb-server
 
-cat >/etc/mysql/conf.d/no_perf_schema.cnf <<_EOF_
+cat <<EOF >/etc/mysql/conf.d/no_perf_schema.cnf
 [mysqld]
 performance_schema = off
-_EOF_
+EOF
 
-mv /etc/mysql/my.cnf.fallback /etc/mysql/my.cnf
 chown mysql:mysql /etc/mysql/my.cnf
-cat >/etc/mysql/my.cnf <<_EOF_
+rm -f /etc/init.d/mysql
-[mysql]
-
-!includedir /etc/mysql/conf.d/
-_EOF_
-
-rm /etc/init.d/mysql
 systemctl daemon-reload
-systemctl enable mariadb
+systemctl enable mariadb