[Merge] lp:~phablet-team/messaging-framework/set-error-when-remove-self-handle into lp:messaging-framework

[Roberto Mier Escandón ]

Roberto Mier Escandón  has proposed merging lp:~phablet-team/messaging-framework/set-error-when-remove-self-handle into lp:messaging-framework.

Commit message:
- When cancelling group, do this:
1) remove self handle giving a reason
2) close channel

- Provided an enum of generic reasons for cancelling the group
- Removed not needed on_closed() callback in Chat object.

NOTE: This MRs should be landed along with https://code.launchpad.net/~ningbo-team/ningbo/set-reason-when-cancelling-group/+merge/302508

Requested reviews:
  Ubuntu Phablet Team (phablet-team)

For more details, see:
https://code.launchpad.net/~phablet-team/messaging-framework/set-error-when-remove-self-handle/+merge/302509

- When cancelling group, do this:
1) remove self handle giving a reason
2) close channel

- Provided an enum of generic reasons for cancelling the group
- Removed not needed on_closed() callback in Chat object.

NOTE: This MRs should be landed along with https://code.launchpad.net/~ningbo-team/ningbo/set-reason-when-cancelling-group/+merge/302508
-- 
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~phablet-team/messaging-framework/set-error-when-remove-self-handle into lp:messaging-framework.
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