Select Simulator Device & SDK

* use deviceName + version caps to launch a particular simulator device and SDK version (6.1, 7.0.3, 7.1)
* update appium-instruments submodule with corresponding change
* fail if the user tries to set preferences or language/locale and full-reset is requested since they don't work together

Fix #2032, #1642, #304
Merge pull request #2060 from dandoveralba/51support

Select Simulator Device & SDK