Resolve "Investigate GitLab-CI services don't reach each other"

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

Related to #335

.gitlab/ci/.test.yml

@@ -11,7 +11,7 @@ integration-test-gosdn:
         MONGO_INITDB_ROOT_PASSWORD: example
         INTEGRATION_TEST_TARGET_A: gnmi-target_A:7030
         INTEGRATION_TEST_TARGET_B: gnmi-target_B:7030
-        RABBITMQ_HOSTNAME: rabbitmq
+        INTEGRATION_TEST_RABBITMQ_HOSTNAME: rabbitmq
     services:
       - name: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/mongo:7
         alias: mongo