Fix MariaDB installation option

INSTALL/CentOS - Quick Install.sh

@@ -119,7 +119,7 @@ read -p "Do you want to install MariaDB? Y/N " installdbserver
 #Changes input to uppercase
 sqliteormariadb=${installdbserver^}
 
-if [ "installdbserver" = "M" ] || [ "$installdbserver" = "" ]; then
+if [ "installdbserver" = "Y" ] || [ "$installdbserver" = "" ]; then
     echo "========================================================="
     echo "Installing MariaDB repository..."
 	#Add the MariaDB repository to yum
@@ -282,4 +282,4 @@ if [ "$createSuperJson" = "Y" ]; then
 	echo "|| You can edit these settings in \"super.json\"         ||"
 	echo "|| located in the Shinobi directory.                   ||"
     echo "========================================================="
-fi
+fi