Handle case where PB endpoint is invalid
Handle case where PB endpoint is invalid

Change-Id: I66dcb2d763e527dec92727ff287d87f002b83d9b
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/6525
Tested-by: Jenkins Server
Reviewed-by: Nicholas E. Bofferding <fb8db48116bc8a69e29dd8cdb037246f232f4af5@us.ibm.com>
Reviewed-by: A. Patrick Williams III <c87e37b1a4035affd737b461af89fb722d635f4d@us.ibm.com>

open-power/hostboot,csmart/hostboot,alvintpwang/hostboot,open-power/hostboot,alvintpwang/hostboot,alvintpwang/hostboot,Over-enthusiastic/hostboot,open-power/hostboot,open-power/hostboot,csmart/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,csmart/hostboot,alvintpwang/hostboot,open-power/hostboot,Over-enthusiastic/hostboot,csmart/hostboot,csmart/hostboot,alvintpwang/hostboot