Adds presigned url tests for each verb and for sts tokens

Conflicts:
	testcases/cloud_user/s3/object_tests.py
Merge branch 'query_auth_4.0' of https://github.com/zhill/eutester into zhill-query_auth_4.0

Conflicts:
	testcases/cloud_user/s3/object_tests.py
Merge branch 'zhill-query_auth_4.0' into maint/4.0/testing