Implement a filter usable by PasteDeploy to forge
the headers normally used by keystonemiddleware to signal
a properly authenitcated request. The filter needs to be
added to the pipeline in paste.ini if noauth support is needed
for testing.
- Add PasteDeploy config to disable keystone config loading
Change-Id: Ie33ee86f1ca8209a6d96cf34c41acd7dca848d58
455fa1fb79