AutoTest: Provide some integration into Projects view

Mandatory:

1. Add some integration to Projects view to be able to automatically run tests after (successful) build.  
2. Add some project wide settings for tests that can override global settings (similar to Coding Style, Clang Static Analyzer, ...)  
3. Enabling/disabling frameworks per project  

 Maybe:

1. Give the user a way to explicitly mark executables (built by the current project) as test executables and pipe their output automatically to the respective output processor to be able to display the result on the results pane if they get ran. -[especially helpful for GenericProject or running tests on non-Desktop devices]
2. Test framework specific stuff (e.g. GTest filter on a per project base)