Change mariadb repo positioning to support buster.

install/hst-install-debian.sh

@@ -578,10 +578,10 @@ APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1 apt-key add /tmp/php_signing.key > /dev/n
 # Installing MariaDB repo
 echo "(*) MariaDB"
 echo "deb [arch=amd64] http://ams2.mirrors.digitalocean.com/mariadb/repo/10.3/$VERSION $codename main" > $apt/mariadb.list
-if [ "$release" -eq 9 ]; then
-    APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1 apt-key adv --recv-keys --keyserver keyserver.ubuntu.com F1656F24C74CD1D8 > /dev/null 2>&1
-else
+if [ "$release" -eq 8 ]; then
     APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1 apt-key adv --recv-keys --keyserver keyserver.ubuntu.com CBCB082A1BB943DB > /dev/null 2>&1
+else
+    APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1 apt-key adv --recv-keys --keyserver keyserver.ubuntu.com F1656F24C74CD1D8 > /dev/null 2>&1
 fi
 
 # Installing Backport repo for debian 8