With Nitrogen, it can take some time after stop is issued for
karaf container to actually come down. Add a sleep to allow
time for stop to complete before execing karaf.
Change-Id: Ifb39cb78390bd595791cc96ac148d17d3c9db08c
Issue-ID: CCSDK-208 Signed-off-by: Timoney, Dan (dt5972) <dt5972@att.com>