Check for HOSTBOOT_VERSION env variable when getting imageId
Check for HOSTBOOT_VERSION env variable when getting imageId

Change-Id: I3e51a754bed82370b6d25a508f1dfe8fd6a94784
RTC: 118253
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/15870
Tested-by: Jenkins Server
Reviewed-by: PRACHI GUPTA <25a72946fc4ec2539bba3cff1fbb2916af6a7649@us.ibm.com>
Reviewed-by: Brian Silver <af0eed78d989d9597decc8b92fa6db01ef8b58e0@us.ibm.com>
Reviewed-by: A. Patrick Williams III <c87e37b1a4035affd737b461af89fb722d635f4d@us.ibm.com>

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