Aravis several updates

* Fix adressing camera with id=0

* Aravis buffer property control & status added

* Modify of autoexposure algorith, ream frame ID from aravis + new properites

* Change of macro name

* VideoCapture now returns no frame on camera disconnecion

* Allow aravis-0.4 usage, proper camera object release.

PCL PR 1205

This reverts commit f45da986.

Fixes clang warnings about uses of this obsolete keyword.

  * use round-to-neaerest in div of carotene

https://github.com/opencv/opencv/issues/7380

Aravis SDK: Basic software based autoexposure control

* Basic software based autoexposure control

* Aravis autoexposure: skip frame taken while changing exposure setup

we are drawing on a BGR image declared as RGB, so we should not swap
components here either.

also correctly forward spacing parameter in fontQt