[Tests] Simple fix on mocked JSON

Signed-off-by: Miguel M. Almeida <miguelcma@gmail.com>
[Identify] Refactor !auto_identified to identified

From now on, we do not recognize an anonymous user as an "auto identified" anoymore:

So, the two types of users are:

* Identified users
* Non-identified, a.k.a. anonymous (previous "auto identified" users)

Signed-off-by: Miguel M. Almeida <miguelcma@gmail.com>
[Device] Remove _ prefix from all device attribute keys

Signed-off-by: Miguel M. Almeida <miguelcma@gmail.com>
[Attributes] Assert reserved attr names on 4 entities

Reserved attributes are:

* LQUser: id, _id, unique_id, identified, aliased, aliased_unique_id, created_at, updated_at
* LQDevice: id, _id, unique_id, platform, ip_address, created_at, updated_at
* LQSession: id, _id, unique_id, started_at, ended_at, length, created_at, updated_at
* LQEvent: id, _id, name, date, created_at, updated_at

Signed-off-by: Miguel M. Almeida <miguelcma@gmail.com>
[Device] attrs device_model and device_name renamed

Changed device attributes:

* `device.device_model` changed to `device.model`
* `device.device_name` changed to `device.name`

Signed-off-by: Miguel M. Almeida <miguelcma@gmail.com>
[APNS] Cached to avoid null value on first data point

Signed-off-by: Miguel M. Almeida <miguelcma@gmail.com>