test_s3: Add tests of post object.

Tests the implementation of browser based uploads via a POST request.

Signed-off-by: caleb miles <caleb.miles@inktank.com>
s3tests: fix post tests

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
rgw: add missing fails_on_dho to post tests

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
test_s3: add test_object_copy_canned_acl

test copy object with canned acl modification

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
rgw: remove fails_on_dho tags

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
rgw: remove more fails_on_dho tags

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
rgw: fix post tests to include tcp port

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
requirements.txt: change requests package requirement

Specifying a specific version number (0.14.0). Newer version (1.1.0)
does not handle POST redirect correctly.

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
test_s3: check stats correct after multipart upload

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>