ASACORE-862: Fix possible race in MessagePump shutdown loading to deadlock

Change-Id: I85f894d87e9b696371227d7d71e66e1909184083
Signed-off-by: Craig Dowell <cdowell@qce.qualcomm.com>
Merge remote-tracking branch 'origin/feature/udp_transport' into temp/integration-14.10

Change-Id: I694dc85c3138271386a885c6fc4577b48d45d204
Signed-off-by: QCE Seabuild <qce.seabuild@qce.qualcomm.com>