Revert "A 401 error should result in re-authenticating for a new token"

This reverts commit 7b0cd9be43a6035a71652bb5c9f3cd604e18eb9d.

References JCLOUDS-231
Enable time-bound signed URL tests for HPCS.

HP does, in fact, support configurable temporary signed URLs:
http://docs.hpcloud.com/api/object-storage#temp_url

References JCLOUDS-231