Description of problem:
There is incorrect error handling in subscription-manager. I have seen it to report "'exceptions.ValueError' object has no attribute 'msg'" instead of reasonable error message.


Version-Release number of selected component (if applicable):
subscription-manager-1.9.11-1.el6.x86_64
python-rhsm-1.9.6-1.el6.x86_64


How reproducible:
rarely


Steps to Reproduce:
1. I'm unable to reproduce the issue now. Seen it only once.
   # subscription-manager register --force --username <user> --password <pass>


Actual results:
'exceptions.ValueError' object has no attribute 'msg'
The system has been registered with ID: <systemID>


Expected results:
Correct error should be displayed.


Additional info:
Relevant part from the log:

[...]
2014-06-17 04:29:55,516 [DEBUG]  @connection.py:402 - Loading CA certificate: '/etc/rhsm/ca/redhat-uep.pem'
2014-06-17 04:29:55,517 [DEBUG]  @connection.py:441 - Making request: GET /subscription/consumers/d4aae02e-6638-42bd-8170-4d51f6fbc461/compliance
2014-06-17 04:29:58,228 [DEBUG]  @connection.py:460 - Response status: 502
2014-06-17 04:29:58,228 [ERROR]  @connection.py:489 - Response: 502
2014-06-17 04:29:58,229 [ERROR]  @managercli.py:151 - exception caught in subscription-manager
2014-06-17 04:29:58,229 [ERROR]  @managercli.py:152 - 'exceptions.ValueError' object has no attribute 'msg'
Traceback (most recent call last):
  File "/usr/sbin/subscription-manager", line 82, in <module>
    sys.exit(abs(main() or 0))
  File "/usr/sbin/subscription-manager", line 73, in main
    return managercli.ManagerCLI().main()
  File "/usr/share/rhsm/subscription_manager/managercli.py", line 2253, in main
    return CLI.main(self)
  File "/usr/share/rhsm/subscription_manager/cli.py", line 166, in main
    return cmd.main()
  File "/usr/share/rhsm/subscription_manager/managercli.py", line 441, in main
    return_code = self._do_command()
  File "/usr/share/rhsm/subscription_manager/managercli.py", line 1115, in _do_command
    self._request_validity_check()
  File "/usr/share/rhsm/subscription_manager/managercli.py", line 244, in _request_validity_check
    inj.require(inj.CERT_SORTER).force_cert_check()
  File "/usr/share/rhsm/subscription_manager/injection.py", line 98, in require
    return FEATURES.require(feature, *args, **kwargs)
  File "/usr/share/rhsm/subscription_manager/injection.py", line 72, in require
    self.providers[feature] = provider()
  File "/usr/share/rhsm/subscription_manager/cert_sorter.py", line 321, in __init__
    super(CertSorter, self).__init__()
  File "/usr/share/rhsm/subscription_manager/cert_sorter.py", line 66, in __init__
    self.load()
  File "/usr/share/rhsm/subscription_manager/cert_sorter.py", line 116, in load
    self._parse_server_status()
  File "/usr/share/rhsm/subscription_manager/cert_sorter.py", line 135, in _parse_server_status
    status = self.get_compliance_status()
  File "/usr/share/rhsm/subscription_manager/cert_sorter.py", line 333, in get_compliance_status
    return status_cache.load_status(self.cp_provider.get_consumer_auth_cp(), self.identity.uuid)
  File "/usr/share/rhsm/subscription_manager/cache.py", line 216, in load_status
    self._sync_with_server(uep, uuid)
  File "/usr/share/rhsm/subscription_manager/cache.py", line 201, in _sync_with_server
    self.server_status = uep.getCompliance(uuid)
  File "/usr/lib64/python2.6/site-packages/rhsm/connection.py", line 817, in getCompliance
    return self.conn.request_get(method)
  File "/usr/lib64/python2.6/site-packages/rhsm/connection.py", line 541, in request_get
    return self._request("GET", method)
  File "/usr/lib64/python2.6/site-packages/rhsm/connection.py", line 469, in _request
    self.validateResponse(result, request_type, handler)
  File "/usr/lib64/python2.6/site-packages/rhsm/connection.py", line 490, in validateResponse
    log.error("JSON parsing error: %s" % e.msg)
AttributeError: 'exceptions.ValueError' object has no attribute 'msg'
2014-06-17 04:29:58,452 [DEBUG]  @plugins.py:519 - loaded plugin modules: []
2014-06-17 04:29:58,452 [DEBUG]  @plugins.py:520 - loaded plugins: {}
[...]