Bitbucket repo_users fails with a 429 and is not handled properly

[paulbehrisch]

https://github.com/atlassian-api/atlassian-python-api/blob/master/atlassian/bitbucket.py#L168

The return fails when the rate limit on the server was reached and there's no clear indication of what the problem is or what the error was.

I had to fork the project and edit the code to find out what's going on.

I used the following for testing

    resp = self.get(url, params=params)
    print(resp)
    return (resp or {}).get('values')

Before my change I was getting this error message:

I'm not across the whole code base, so I'm not sure where would be the best place to add that check.

[flichtenheld]

PR #904 might address this