##### SUMMARY
`ansible-base collection list` doesn't show the packages installed by the new `ansible` package

As a workaround, you need to do:

```
COLLECTION_INSTALL=$(python -c 'import ansible, os.path ; print("%s/../ansible_collections" % os.path.dirname(ansible.__file__))')
ansible-galaxy collection list -p "$COLLECTION_INSTALL"
```

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
ansible-galaxy

##### ANSIBLE VERSION
```paste below
2.10 beta1
```

##### CONFIGURATION
```paste below

```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->


##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->

1. Install Ansible 2.10.0a1
  https://pypi.python.org/packages/source/a/ansible/ansible-2.10.0a1.tar.gz

2. `ansible-galaxy collection list`

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->


##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->

<!--- Paste verbatim command output between quotes -->
```paste below

```

galaxy_options[optional_key] = context.CLIARGS[optional_key]
        config_servers = []
        
        server_list = [s for s in C.GALAXY_SERVER_LIST or [] if s]
        for server_key in server_list:
            
            
            config_dict = dict((k, server_config_def(server_key, k, req)) for k, req in server_def)
            defs = AnsibleLoader(yaml.safe_dump(config_dict)).get_single_data()
            C.config.initialize_plugin_configuration_definitions('galaxy_server', server_key, defs)
            server_options = C.config.get_plugin_options('galaxy_server', server_key)
            
            
            auth_url = server_options.pop('auth_url', None)
            token_val = server_options['token'] or NoTokenSentinel
            username = server_options['username']
            available_api_versions = None
            v3 = server_options.pop('v3', None)
            if v3:
                
                
                
                
                server_options['available_api_versions'] = {'v3': '/v3'}
            
            server_options['token'] = None
            if username:
                server_options['token'] = BasicAuthToken(username,
                                                         server_options['password'])
            else: