Fix missing slash in hook url

[ziouf]

There is an issue with WebHook/SystemHook creation.

In created hook there is a missing '/' in the target url between 'rootUrl' and 'pronoun'.

Here is my contrib.

Regards

[jetersen]

link to see current commit author: https://github.com/jenkinsci/gitlab-branch-source-plugin/pull/61/commits/976b9de4378edad6de3cc5d27800309bbde9f69a.patch

@ziouf
You might want to set up an email alias on your GitHub account 🥇
https://help.github.com/articles/adding-an-email-address-to-your-github-account/

Or look into fixing your git user.email config 😅
https://help.github.com/articles/setting-your-commit-email-address-in-git
then you would need to amend your commits: https://stackoverflow.com/a/3042512
after changing author

to get proper credit for your commits 🏆

[ziouf]

Commit amended.
Thank you @Casz

[jetersen]

This should have been done differently 😓

We need to have an method that will ensure the slash is there.
I am seeing webhooks with double slashes https://jenkins.company.local//gitlab-webhook/post