Bug 2131 - NPE when starting controller

* made InvenroryAndReadAdapter wait for BindingAwareBroker because it
was calling DeteBrokerService before it was available

Change-Id: Ie38415194544997bc12d2dd3acfc57bfa8918730
Signed-off-by: Jan Hajnar <jhajnar@cisco.com>
(cherry picked from commit e7cf56bb5194567f9517d627710fa432254241ed)
Merge "Bug 2131 - NPE when starting controller" into stable/helium