##### 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

```

collection_requirements = requirements['collections']
            if requirements['roles']:
                display.vvv(two_type_warning.format('role'))
        else:
            if not install_items and requirements_file is None:
                raise AnsibleOptionsError("- you must specify a user/role name or a roles file")
            if requirements_file:
                if not (requirements_file.endswith('.yaml') or requirements_file.endswith('.yml')):
                    raise AnsibleError("Invalid role requirements file, it must end with a .yml or .yaml extension")
                requirements = self._parse_requirements_file(requirements_file)
                role_requirements = requirements['roles']
                
                
                galaxy_args = self._raw_args
                if requirements['collections'] and (not self._implicit_role or '-p' in galaxy_args or
                                                    '--roles-path' in galaxy_args):
                    
                    
                    display_func = display.warning if self._implicit_role else display.vvv
                    display_func(two_type_warning.format('collection'))
                else:
                    collection_path = self._get_default_collection_path()
                    collection_requirements = requirements['collections']
            else:
                
                
                for rname in context.CLIARGS['args']:
                    role = RoleRequirement.role_yaml_parse(rname.strip())
                    role_requirements.append(GalaxyRole(self.galaxy, self.api, **role))
        if not role_requirements and not collection_requirements: