rewrite Tests with waitForDialogToClose
test race conditions eliminated
added tearDown
no FlakyTest
removed throw exception
use small timeout
waitForActivity
fixed testSaveImage
fixed BaseIntegrationTestClass TIMEOUT and switchToFullscreen
removed comments
Merge branch 'test_refactoring' into PAINT-28_Update_Robotium

Conflicts:
	PaintroidTest/src/org/catrobat/paintroid/test/integration/BaseIntegrationTestClass.java
	PaintroidTest/src/org/catrobat/paintroid/test/integration/MenuFileActivityIntegrationTest.java