Description of problem:

level=error message in the registry logs for every push when configured for AWS S3 storage

time="2016-04-26T08:56:20.046087778-04:00" level=error msg="error authorizing context: authorization header with basic token required" go.version=go1.4.2 http.request.host="172.24.4.23:5000" http.request.id=749007be-4897-4289-af24-ece409f7420c http.request.method=GET http.request.remoteaddr="172.20.1.1:38358" http.request.uri="/v2/" http.request.useragent="docker/1.9.1 go/go1.4.2 kernel/3.10.0-367.el7.x86_64 os/linux arch/amd64" instance.id=a561f38d-2ea1-4fd6-b8d4-1185f6563c6d 

The message does not seem to affect the push, but is concerning to an end-user.

Version-Release number of selected component (if applicable): 3.2.0.19


How reproducible: Always


Steps to Reproduce:
1.  Configure the registry to use AWS S3 storage
version: 0.1
log:
  level: debug
http:
  addr: :5000
auth:
  openshift:
    realm: openshift
storage:
  cache:
    layerinfo: inmemory
  s3:
    accesskey: <key>
    secretkey: <secret>
    region: us-west-2
    bucket: aoe-perf-test
    encrypt: false
    secure: false
    v4auth: true
    rootdirectory: /registry
middleware:
  repository:
    - name: openshift
      options:
        pullthrough: true
2.  Run a build and watch the registry pod's logs


Actual results:

level=error message shown


Expected results:

No errors for normal activity.