brokerlink: Broker can not be disconnected anymore
brokerlink: Broker can not be disconnected anymore

Removed forgotten 'broker disconnect' call, which
is not needed anymore due connectionless broker.

Change-Id: I16bf504bd97b07fdece0bca0c9816e942c6254d3
Bug-Url: https://bugzilla.redhat.com/1488333
Signed-off-by: Denis Chaplygin <c9765bc4e17067a9b371ba0697b416c9f2022720@redhat.com>

oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha