
return xml error message when Accept:application/xml request received. default to json response when none specified. Change-Id: Idd454c5bc76adb583bc0a9afce9f31659e7fe2ac
return xml error message when Accept:application/xml request received. default to json response when none specified. Change-Id: Idd454c5bc76adb583bc0a9afce9f31659e7fe2ac