Implemented usage() function inside reorder_tests_tt2.sh to describe how to use it.
Additionally, 2 new options have been implemented:
- -m git|mv : if set the renaming is performed with "mv" command rather than "git mv", useful if you are not on a git directory
- -t : just outputs the renaming to stdout without really renaming (dry run)
Change-Id: I0be8a2d6468b66d365ec138a09e5ac5873bf694f