##### 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

```

display.display("Skipping install, no requirements found")
            return
        if role_requirements:
            display.display("Starting galaxy role install process")
            self._execute_install_role(role_requirements)
        if collection_requirements:
            display.display("Starting galaxy collection install process")
            
            
            self._execute_install_collection(collection_requirements, collection_path)
    def _execute_install_collection(self, requirements, path):
        force = context.CLIARGS['force']
        ignore_certs = context.CLIARGS['ignore_certs']
        ignore_errors = context.CLIARGS['ignore_errors']
        no_deps = context.CLIARGS['no_deps']
        force_with_deps = context.CLIARGS['force_with_deps']
        allow_pre_release = context.CLIARGS['allow_pre_release'] if 'allow_pre_release' in context.CLIARGS else False
        collections_path = C.COLLECTIONS_PATHS
        if len([p for p in collections_path if p.startswith(path)]) == 0:
            display.warning("The specified collections path '%s' is not part of the configured Ansible "
                            "collections paths '%s'. The installed collection won't be picked up in an Ansible "
                            "run." % (to_text(path), to_text(":".join(collections_path))))
        output_path = validate_collection_path(path)
        b_output_path = to_bytes(output_path, errors='surrogate_or_strict')
        if not os.path.exists(b_output_path):
            os.makedirs(b_output_path)
        install_collections(requirements, output_path, self.api_servers, (not ignore_certs), ignore_errors,
                            no_deps, force, force_with_deps, allow_pre_release=allow_pre_release)
        return 0
    def _execute_install_role(self, requirements):