Renaming API created repositories (BB-10818)

Using the API (https://bitbucket.org/api/1.0/repositories) to create a repository one can specify mutually exclusive names and slugs. Updating any repository detail resubmits the name provide and updates the slug. Thus returning later to modify any value on the repository details page (eg website or description) changes the slug and thus all of the team members and servers need to update their remotes.