Support multiple repositories in same redmine project

[jcppkkk]

• Create local repo with path like namespace/repo, mapping to gitlab.
• One webhook triggers updating for single git repo instead of all repositories under the project.
• Fix a bug that a repo does not get update after been created automatically.

[phlegx]

Hi @jcppkkk! Thank you for your pull request. Nice work!

Can you do the following please:

1. Change all params['xxxxx'] to params[:xxxxx] if possible?
2. We use unless instead of if not now. Line 134.
3. Line 92 change "" to ''

Then we will merge your pull request. Thx! 😃

[phlegx]

Hi @jcppkkk! Thank you so much! 👍 👍 👍

[phlegx]

@jcppkkk can you please add examples how you use the hook with multiple repositories in same redmine project?