* Add support for push scheduling
Add a configuration flag on the server to handle the availability of
push scheduling.
* Update push controller to skip sending only if scheduling is configured
Only skip push sending if scheduling is configured
* Update bad conventions
* Add CLI definitions for push scheduling
* Adds tests for pushTime
* Adds test for scheduling
* nits
* Test for not scheduled
* Update status through increment
* adds support for incrementing nested keys
* fix issue when having spaces in keys for ordering
* Refactors PushController to use worker
* Adds tests for custom push queue config
* Makes PushController adapter independant
* Better logging of _PushStatus in VERBOSE
* Adds jobs endpoint protected by masterKey
* Adds connection timeout for 15 minutes in jobs
* Refactors pushStatusHandler into StatusHandler
* Adds reporting of _JobStatus
* Only accept strings as messages
* Adds test for masterKey basic auth
* Adds CloudCodeRouter for cloud_code endpoint of job status, enable Jobs feature on dashboard
* xit racing test
It's assumed that when push is available, the pushHandler is used and data is saved in _PushStatus.
This allows Parse Dashboard push history to be enabled: ParsePlatform/parse-dashboard#378
