Reddeer works with TP Kepler M6

Bug (https://bugs.eclipse.org/bugs/show_bug.cgi?id=404346) makes our tests failing. Steps we need to do:

1. remove org.hamcrest in all manifest files of reddeer plugins (replace them by the correct ones, e.g. org.hamcrest.core)
2. reference to swtbot update site in parent pom (or in settings.xml) should point to the newest one (2.1.1) 
3. replace junit4 by junit in manifest file