Create database to autotest

Followed:
https://github.com/docker-library/docs/blob/master/postgres/README.md#postgres_db

Signed-off-by: Vitor Mattos <vitor@php.rio>

autotest.sh

@@ -307,7 +307,7 @@ function execute_tests {
 	if [ "$DB" == "pgsql" ] ; then
 		if [ ! -z "$USEDOCKER" ] ; then
 			echo "Fire up the postgres docker"
-			DOCKER_CONTAINER_ID=$(docker run -e POSTGRES_USER="$DATABASEUSER" -e POSTGRES_PASSWORD=owncloud -d postgres)
+			DOCKER_CONTAINER_ID=$(docker run -e POSTGRES_DB="$DATABASENAME" -e POSTGRES_USER="$DATABASEUSER" -e POSTGRES_PASSWORD=owncloud -d postgres)
 			DATABASEHOST=$(docker inspect --format="{{.NetworkSettings.IPAddress}}" "$DOCKER_CONTAINER_ID")
 
 			echo "Waiting for Postgres initialisation ..."