Loop not terminating when enumerating teams

[amotl]

Hi,

@changdingfang submitted a fix to m0nhawk/grafana_api#87, which indicates there might be a problem. Maybe it is useful to bring this improvement to grafana-client as well?

With kind regards,
Andreas.

[amotl]

3d6d9c9 includes the fix by @changdingfang. Thank you again!