CBQE-1069: printout schtasks results

for installme, upgrademe, removeme

Change-Id: I0092da14e6031075f5642890e330086946588cb5
Reviewed-on: http://review.couchbase.org/25033
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>