Use TaskFire utility in bgp_membership_test.cc
Use TaskFire utility in bgp_membership_test.cc

Change-Id: Ideda6248769f2f379c922b79f40485c6f05bba37
Closes-Bug: 1577278

tcpcloud/contrail-controller,tcpcloud/contrail-controller,tcpcloud/contrail-controller,tcpcloud/contrail-controller,tcpcloud/contrail-controller,tcpcloud/contrail-controller