[Merge] lp:~renatofilho/telephony-service/optimize-contact-watch into lp:telephony-service

[Renato Araujo Oliveira Filho]

Renato Araujo Oliveira Filho has proposed merging lp:~renatofilho/telephony-service/optimize-contact-watch into lp:telephony-service.

Commit message:
Improve contac watcher.

Avoid query for the same contact more than once.
Avoid query for contact if others contacts changes, only query if the desired contact changes.
Avoid notify for properties changes if the value of the properties does not change.

Requested reviews:
  Ubuntu Phablet Team (phablet-team)

For more details, see:
https://code.launchpad.net/~renatofilho/telephony-service/optimize-contact-watch/+merge/232714
-- 
https://code.launchpad.net/~renatofilho/telephony-service/optimize-contact-watch/+merge/232714
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~renatofilho/telephony-service/optimize-contact-watch into lp:telephony-service.
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