fix a dispose issue in the PutObjectRequestStream
fix a dispose issue in the PutObjectRequestStream

SpectraLogic/ds3_net_sdk,rpmoore/ds3_net_sdk,SpectraLogic/ds3_net_sdk,RachelTucker/ds3_net_sdk,RachelTucker/ds3_net_sdk,shabtaisharon/ds3_net_sdk,rpmoore/ds3_net_sdk,shabtaisharon/ds3_net_sdk,RachelTucker/ds3_net_sdk,SpectraLogic/ds3_net_sdk,rpmoore/ds3_net_sdk,shabtaisharon/ds3_net_sdk