Make sure that GitHub URLs only contain first org and repo name in "Git Import"

[datho7561]

I entered https://github.com/redhat-developer/vscode-openshift-tools/issues/2909 as the git URL in the git import workflow, and it's stuck on cloning the repo:

It lists the repo as valid. Either we should list the repo as invalid, or automatically strip the /issues/2909 from the URL

[msivasubramaniaan]

When parsing the url which contains issues the git-url-parse not provided the expected organization and name of the repo. Already there is an issue and corresponding PR.