Fixed window deregistration problem on MPI
Fixed window deregistration problem on MPI

zbeekman/opencoarrays,sourceryinstitute/opencoarrays,jerryd/opencoarrays,jerryd/opencoarrays,jerryd/opencoarrays,sourceryinstitute/opencoarrays,sourceryinstitute/opencoarrays,zbeekman/opencoarrays,zbeekman/opencoarrays