Updated the app argument for the installApp, launchApp and closeApp to point to the device rather than appium. Also added a check for the "installToRealDevice" function to check if "launch" desired capability has not been set to false (as in that instance we want to manage installation and launching ourselves).

Changed the launch parameter to autoLaunch (including a check for launch desired capability and deprecation warning).
Merge pull request #2293 from snevesbarros/fix_for_install_launch_remove_requests

Added 2 fixes for when using the installApp, launchApp, removeApp requests seperately