Multipart test with 10k small objects.

Test detects that the server returns the correct error
code

Signed-off-by: Luis Pabón <lpabon@redhat.com>
Merge pull request #21 from lpabon/small_multipart_upload

Multipart test with 10k small objects.

Reviewed-by: Yehuda Sadeh <yehuda@redhat.com>