Shutdown tests

Change-Id: I0595616ad0531f611e029310137f87c2ac16e6c4
Don't printf if shutdown more than twice

Change-Id: Ie779d97cc975f02a48d46e3aceedefcab641a681
Use 'host' instead of 'hosts'

Change-Id: Ie3630bf81c0c79743fcfab33ffad36acef3f086c
Fixup/implement incr/decr

Change-Id: Ib9379e8e019e6053e6641e0ef0d6b52795d98523