Bug 970098

Description of problem:
When endpoint or service has "enabled" attribute set to "False", it is still listed in catalog (`keystone catalog` command and/or in catalog part of token.

Create testing service (simplifies output later):
> localhost:5000
> POST /v3/services
> '{"service":{"name":"My svc","type":"testing"}}'
response:
> {'service': {'id': '<SERVICE-ID>',
>              'links': {'self': 'http://localhost:5000/v3/services/<SERVICE-ID>'},
>              'name': 'My svc',
>              'type': 'testing'}}

Create disabled endpoint:
> localhost:5000
> POST /v3/endpoints
> '{"endpoint":{
>    "enabled":false,
>    "name":"My disabled",
>    "interface":"public",
>    "url":"disabled_URL",
>    "service_id":"<SERVICE-ID>"}}'
response:
> {'endpoint': {'enabled': False,
>               'id': '<ENDPOINT-ID>',
>               'interface': 'public',
>               'links': {'self': 'http://localhost:5000/v3/endpoints/<ENDPOINT-ID>'},
>               'name': 'My disabled',
>               'region': None,
>               'service_id': '<SERVICE-ID>',
>               'url': 'disabled_URL'}}

Now request token and see that it's catalog/endpoints part contains:
> localhost:5000
> POST /v3/auth/tokens
> '{"auth":{
>  "identity":
>    {"methods":["password"],
>     "password":{
>       "user":{"name":"admin","domain":{"id":"default"},"password":"pass"}}},
>  "scope":{"project":{"name":"admin","domain":{"id":"default"}}}}}
snippet of response:
> {'token': {'catalog': [
> ...
>   {'endpoints': [{'enabled': False,
>                  'id': '<ENDPOINT-ID>',
>                  'interface': 'public',
>                  'legacy_endpoint_id': None,
>                  'name': 'My disabled',
>                  'region': None,
>                  'url': 'disabled_URL'}],
>    'id': '<SERVICE-ID>',
>    'type': 'testing'},
> ...

Also it gets listed in response of `keystone catalog` (API v2):
> # keystone catalog --service testing
> Service: testing
> +-----------+----------------------------------+
> |  Property |              Value               |
> +-----------+----------------------------------+
> |     id    |        <ENDPOINT-ID>             |
> | publicURL |        disabled_URL              |
> |   region  |                                  |
> +-----------+----------------------------------+

The same example applies to Service with enabled=false.

See https://github.com/openstack/identity-api/blob/master/openstack-identity-api/src/markdown/identity-api-v3.md#endpoints-v3endpoints for description of enabled attribute for Endpoint.

And https://github.com/openstack/identity-api/blob/master/openstack-identity-api/src/markdown/identity-api-v3.md#services-v3services for description of Service.