##### 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

```

"""
        List all roles installed on the local system or a specific role
        """
        path_found = False
        role_found = False
        warnings = []
        roles_search_paths = context.CLIARGS['roles_path']
        role_name = context.CLIARGS['role']
        for path in roles_search_paths:
            role_path = GalaxyCLI._resolve_path(path)
            if os.path.isdir(path):
                path_found = True
            else:
                warnings.append("- the configured path {0} does not exist.".format(path))
                continue
            if role_name:
                
                gr = GalaxyRole(self.galaxy, self.api, role_name, path=os.path.join(role_path, role_name))
                if os.path.isdir(gr.path):
                    role_found = True
                    display.display('# %s' % os.path.dirname(gr.path))
                    _display_role(gr)
                    break
                warnings.append("- the role %s was not found" % role_name)