[Merge] lp:~binli/ubuntu/trusty/modemmanager/lp1441095 into lp:ubuntu/trusty/modemmanager

[Bin Li]

Follow Shi-Yuan's advice, I uncommitted the seven commits, and do one commit.
And update the bug number and series for release.
Thanks a lot!

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https://code.launchpad.net/~binli/ubuntu/trusty/modemmanager/lp1441095/+merge/272054
Your team Ubuntu branches is requested to review the proposed merge of lp:~binli/ubuntu/trusty/modemmanager/lp1441095 into lp:ubuntu/trusty/modemmanager.