add support for filter_entity_type on transfer client endpoint search#1109

sirosen merged 3 commits intoglobus:mainglobus/globus-sdk-python:mainfrom

pjhinton-globus:pjhinton/sc-37389-transfer-client-collection-search-filter-entity-typepjhinton-globus/globus-sdk-python:pjhinton/sc-37389-transfer-client-collection-search-filter-entity-typeCopy head branch name to clipboard