fix a failing test in the unit-test target used to generate swagger docs

tools/docker-compose/unit-tests/docker-compose.yml

@@ -9,6 +9,10 @@ services:
     environment:
       SWIG_FEATURES: "-cpperraswarn -includeall -I/usr/include/openssl"
       TEST_DIRS: awx/main/tests/functional awx/main/tests/unit awx/conf/tests awx/sso/tests
+      RABBITMQ_HOST: rabbitmq
+      RABBITMQ_USER: guest
+      RABBITMQ_PASS: guest
+      RABBITMQ_VHOST: /
     command: ["make test_combined"]
     volumes:
       - ../../../:/awx_devel