checksum verification fails if binary exists

[andrewschoen]

When using --force and re-uploading a binary the checksum verification step fails with an exception like:

Traceback (most recent call last):
  File "/tmp/venv.CzmM0ZXkCH/bin/chacractl", line 6, in <module>
    main.ChacraCtl()
  File "/tmp/venv.CzmM0ZXkCH/lib/python2.7/site-packages/chacractl/main.py", line 38, in __init__
    self.main(argv)
  File "/tmp/venv.CzmM0ZXkCH/lib/python2.7/site-packages/chacractl/decorators.py", line 68, in newfunc
    return f(*a, **kw)
  File "/tmp/venv.CzmM0ZXkCH/lib/python2.7/site-packages/chacractl/main.py", line 82, in main
    parser.dispatch()
  File "/tmp/venv.CzmM0ZXkCH/lib/python2.7/site-packages/tambo/dispatcher.py", line 21, in dispatch
    return instance.main()
  File "/tmp/venv.CzmM0ZXkCH/lib/python2.7/site-packages/chacractl/api/binaries.py", line 161, in main
    self.post(url, filename)
  File "/tmp/venv.CzmM0ZXkCH/lib/python2.7/site-packages/chacractl/api/binaries.py", line 86, in post
    return self.put(file_url, filepath)
  File "/tmp/venv.CzmM0ZXkCH/lib/python2.7/site-packages/chacractl/api/binaries.py", line 123, in put
    if not self.upload_is_verified(url, filename, digest):
  File "/tmp/venv.CzmM0ZXkCH/lib/python2.7/site-packages/chacractl/api/binaries.py", line 71, in upload_is_verified
    arch_data = r.json()
  File "/tmp/venv.CzmM0ZXkCH/lib/python2.7/site-packages/requests/models.py", line 826, in json
    return complexjson.loads(self.text, **kwargs)
  File "/usr/lib64/python2.7/json/__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python2.7/json/decoder.py", line 365, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib64/python2.7/json/decoder.py", line 383, in raw_decode
    raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded

This is because when chacractl uses PUT to re-upload, the url that it uses to get the checksum includes the binary name. This makes the url incorrect for the upload_is_verified method and it can not get at the binary data it expects to be in the json payload. In fact, there is no json at all at that endpoint.

This was found during this job: https://jenkins.ceph.com/job/ceph-dev-build/807/ARCH=x86_64,AVAILABLE_ARCH=x86_64,AVAILABLE_DIST=centos7,DIST=centos7,MACHINE_SIZE=huge/console