Fix issues with keystone-dsvm-py35-functional-v3-only on py35

keystone/token/providers/fernet/token_formatters.py
* decode payload[2] from bytes to string before comparing
  with a string (CONF.identity.default_domain_id)

keystone_tempest_plugin/services/identity/clients.py
keystone_tempest_plugin/services/identity/v3/auth_client.py
keystone_tempest_plugin/services/identity/v3/identity_providers_client.py
* decode the response body from bytes to string before we
  try to parse the json using json.loads

Change-Id: I98053bc498d78c5f0076a66e725ff2d634f5b663
3 files changed
tree: c63a159f9fc88c3473cd585629aecf599d8c6559
  1. keystone_tempest_plugin/