Collections list test delete

[MilanPospisil]

Added deletion in Collections list test using galaxykit.

[himdel]

Code looks good, but galaxykit namespace delete my_namespace seems to be failing for some reason.

If the new version of galaxykit is not released yet you may need this change:

diff --git a/.github/workflows/cypress.yml b/.github/workflows/cypress.yml
index 60b95ee..e3bd0f5 100644
--- a/.github/workflows/cypress.yml
+++ b/.github/workflows/cypress.yml
@@ -26,7 +26,7 @@ jobs:
 
     - name: "Install galaxykit dependency"
       run: |
-        pip install galaxykit
+        pip install git+https://github.com/ansible/galaxykit.git
 
     - name: "Set env.SHORT_BRANCH, env.GALAXY_NG_COMMIT"
       run: |

(looks like ansible/galaxykit#20 was merged Dec 23, but the latest release is from Dec 1st)

[himdel]

LGTM 👍

And I think we can keep pip installing from github on master without problems,
only stable-* branches should probably depend on released versions.