Merge branch 'fixVarTest' into 'master'

check emptyness of GO_TEST_IMAGE

Closes #34

See merge request to-be-continuous/golang!65

templates/gitlab-ci-golang.yml

@@ -512,7 +512,7 @@ go-test:
       - "$GO_PROJECT_DIR/reports/go-coverage.*"
   rules:
     # if $GO_TEST_IMAGE set
-    - if: '$GO_TEST_IMAGE == null'
+    - if: '$GO_TEST_IMAGE == ""'
       when: never
     - !reference [.test-policy, rules]
 
@@ -540,7 +540,7 @@ go-build-test:
       - "$GO_PROJECT_DIR/reports/go-coverage.*"
   rules:
     # if $GO_TEST_IMAGE not set
-    - if: '$GO_TEST_IMAGE == null'
+    - if: '$GO_TEST_IMAGE == ""'
 
 go-ci-lint:
   extends: .go-base