##### 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

```

else:
                if not os.path.exists(role_path):
                    warnings.append("- the configured path %s does not exist." % role_path)
                    continue
                if not os.path.isdir(role_path):
                    warnings.append("- the configured path %s, exists, but it is not a directory." % role_path)
                    continue
                display.display('# %s' % role_path)
                path_files = os.listdir(role_path)
                for path_file in path_files:
                    gr = GalaxyRole(self.galaxy, self.api, path_file, path=path)
                    if gr.metadata:
                        _display_role(gr)
        
        if role_found and role_name:
            warnings = []
        for w in warnings:
            display.warning(w)
        if not path_found:
            raise AnsibleOptionsError("- None of the provided paths were usable. Please specify a valid path with --{0}s-path".format(context.CLIARGS['type']))
        return 0
    def execute_list_collection(self):
        """
        List all collections installed on the local system
        """
        collections_search_paths = set(context.CLIARGS['collections_path'])
        collection_name = context.CLIARGS['collection']
        default_collections_path = C.config.get_configuration_definition('COLLECTIONS_PATHS').get('default')
        warnings = []
        path_found = False