Fix: quay secrets name change

This patch fixes credentials names and adds a check that verifies if
containers repository credentials are correct by logging-in and logging-out
of repo on check and gate jobs run.

Change-Id: I13d7f9841f93f1514ce35711958460b421c90db4

tools/gate/playbooks/docker-image-build.yaml

@@ -89,6 +89,16 @@
     - name: Make images
       when: not publish
       block:
+        # Just verify if we can login to the containers repository
+        - docker_login:
+            username: "{{ airship_armada_quay_creds.username }}"
+            password: "{{ airship_armada_quay_creds.password }}"
+            registry_url: "https://quay.io/api/v1/"
+
+        - docker_login:
+            state: absent
+            registry_url: "https://quay.io/api/v1/"
+
         - make:
             chdir: "{{ zuul.project.src_dir }}"
             target: images