Fix keycloak start script

Author: MarcialRosales

selenium/bin/components/keycloak

@@ -12,7 +12,7 @@ ensure_keycloak() {
 init_keycloak() {
   KEYCLOAK_CONFIG_PATH=${KEYCLOAK_CONFIG_PATH:-oauth/keycloak}
   KEYCLOAK_CONFIG_DIR=$(realpath ${TEST_DIR}/${KEYCLOAK_CONFIG_PATH})
-  KEYCLOAK_URL=${OAUTH_PROVIDER_URL}
+  KEYCLOAK_URL=${KEYCLOAK_URL:-OAUTH_PROVIDER_URL}
 
   print "> KEYCLOAK_CONFIG_DIR: ${KEYCLOAK_CONFIG_DIR}"
   print "> KEYCLOAK_URL: ${KEYCLOAK_URL}"