chore: update lms, cms port variable name

Author: salman2013

docker-compose.yml

@@ -423,8 +423,8 @@ services:
     tty: true
     environment:
       FRONTEND_TEST_SERVER_HOSTNAME: edx.devstack.lms
-      SERVER_LMS_PORT: 18003
-      SERVER_CMS_PORT: 18031
+      FRONTEND_TEST_SERVER_LMS_PORT: 18003
+      FRONTEND_TEST_SERVER_CMS_PORT: 18031
       EDXAPP_TEST_MONGO_HOST: edx.devstack.mongo
       NO_PYTHON_UNINSTALL: 1
       DJANGO_WATCHMAN_TIMEOUT: 30
@@ -600,8 +600,8 @@ services:
     tty: true
     environment:
       FRONTEND_TEST_SERVER_HOSTNAME: edx.devstack.cms
-      SERVER_LMS_PORT: 18103
-      SERVER_CMS_PORT: 18131
+      FRONTEND_TEST_SERVER_LMS_PORT: 18103
+      FRONTEND_TEST_SERVER_CMS_PORT: 18131
       EDXAPP_TEST_MONGO_HOST: edx.devstack.mongo
       VIRTUAL_ENV: "/edx/app/edxapp/venvs/edxapp"
       PATH: "/edx/app/edxapp/venvs/edxapp/bin:/edx/app/edxapp/nodeenv/bin:/edx/app/edxapp/edx-platform/node_modules/.bin:/edx/app/edxapp/edx-platform/bin:${PATH}"