[DO-1670] add_msg_files_to_test (!97)

Co-authored-by: Rustam Tagaev <rustam.tagaev@avroid.tech>
Reviewed-on: https://git.avroid.tech/DevOps/jenkins-pipelines/pulls/97
Reviewed-by: Denis Patrakeev <denis.patrakeev@avroid.team>

pipelines/Cloud/Apps-Backend/msg-files.groovy

@@ -15,7 +15,7 @@ String repoPath = 'Apps-Backend/msg-files.git'
 
 Map envBranch = [
     'DEV': 'develop',
-    // 'TEST': 'test'
+    'TEST': 'test'
 ]
 
 String dockerGroup = 'cloud'