Disallowing completed frameworks from re-registering with the same framework id

[Vinod Kone <vi...@twitter.com.INVALID>]

Hi,

Currently, there is a bug in Mesos, which allows a completed framework
(e.g., removed by master due to being disconnected for longer than failover
timeout) to re-register with the same framework id. This causes issues in
the WebUI because the same framework id exists in "active" and "terminated"
frameworks.

https://issues.apache.org/jira/browse/MESOS-1219 fixes this by disallowing
completed framework from re-registering with the same id. This is slated to
land in the next release (0.21.0) but not the upcoming release (0.20.0) to
give frameworks time to get updated. If you are a framework developer,
please update your code so that you don't depend on the buggy behavior.

Please let me know if you have questions/concerns.

Thanks,
@vinodkone