[HapProcessCeilometer] Add a mechanism that rember alarm IDs at the aquisition.
[HapProcessCeilometer] Return an error code.
[HapProcessCeilometer] Check the return value of soup_message_new().
[HapProcessCeilometer] Add a feature to send Events.
[testHapProcessCeilometer] Add tests for parseAlarmHistoryDetail().
[HapProcessCeilometer] Send only updated alarm histories (events).
[HapProcessCeilometer] Sort alarm histories by the time before the save.

We assume the events are sorted by the time. However ceilometer returns
events (alarm histories) in descending order. So we have to sort them before
they are sent to Hatohol server.
Merge pull request #544 from project-hatohol/hatohol-arm-plugin-ceilometer-c++-7

Hatohol arm plugin ceilometer c++ 7