Daisy once used hwm to discover & provision hosts. But for opensource
we can not asume hwm exists all the time so we have to make it a
pluggable module before we can accept it. Currently just kill it.
Daisy should still be able to discover & provision hosts without
hwm.
Change-Id: I59d19718b0113f1c1d2ccedb968b8d594e90f670
Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>