Add option for running GC whether progress information should be shown

By default progress information on GC is not shown anymore. The
progress information is not useful if the command output should be
parsed by scripts or if it should be shown in the UI. Add new option
was added so that the progress information can be switched on.

Change-Id: I9d7d04f4e2666002dc9de05764e010d052d964e8
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
4 files changed