<!--- Verify first that your issue is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
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##### SUMMARY
<!--- Explain the problem briefly below -->
We publish semver collection (vyos.vyos:0.0.1-dev58) to ansible galaxy, however by default it seems ansible-galaxy client will not be able to find it. You must specific the version number directly to fetch it.

https://galaxy.ansible.com/vyos/vyos


EDIT:

This is working as expect, but it would be nice to Include:

   --pre                       Include pre-release and development versions. By default, ansible-galaxy only finds stable versions.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
ansible-galaxy

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.9.1
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below

```


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

<!--- Paste example playbooks or commands between quotes below -->
```yaml
$ ansible-galaxy collection install vyos.vyos -p /tmp/11123
[WARNING]: The specified collections path '/tmp/11123' is not part of the configured Ansible collections paths '/home/pabelanger/.ansible/collections:/usr/share/ansible/collections'. The
installed collection won't be picked up in an Ansible run.

Process install dependency map
ERROR! Cannot meet requirement * for dependency vyos.vyos from source 'https://galaxy.ansible.com/api/'. Available versions before last requirement added: 
Requirements from:
	base - 'vyos.vyos:*'
(venv) [pabelanger@localhost openstack]$ ansible-galaxy collection install vyos.vyos:0.0.1-dev57 -p /tmp/11123
[WARNING]: The specified collections path '/tmp/11123' is not part of the configured Ansible collections paths '/home/pabelanger/.ansible/collections:/usr/share/ansible/collections'. The
installed collection won't be picked up in an Ansible run.

Process install dependency map
Starting collection install process
Installing 'vyos.vyos:0.0.1-dev57' to '/tmp/11123/ansible_collections/vyos/vyos'
```

<!--- HINT: You can paste gist.github.com links for larger files -->

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
vyos.vyos collection to be found and installed

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

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

```

"""
    Install Ansible collections to the path specified.
    :param collections: The collections to install, should be a list of tuples with (name, requirement, Galaxy server).
    :param output_path: The path to install the collections to.
    :param apis: A list of GalaxyAPIs to query when searching for a collection.
    :param validate_certs: Whether to validate the certificates if downloading a tarball.
    :param ignore_errors: Whether to ignore any errors when installing the collection.
    :param no_deps: Ignore any collection dependencies and only install the base requirements.
    :param force: Re-install a collection if it has already been installed.
    :param force_deps: Re-install a collection as well as its dependencies if they have already been installed.
    """
    existing_collections = find_existing_collections(output_path)
    with _tempdir() as b_temp_path:
        display.display("Process install dependency map")
        with _display_progress():
            dependency_map = _build_dependency_map(collections, existing_collections, b_temp_path, apis,
                                                   validate_certs, force, force_deps, no_deps)
        display.display("Starting collection install process")
        with _display_progress():
            for collection in dependency_map.values():
                try:
                    collection.install(output_path, b_temp_path)
                except AnsibleError as err:
                    if ignore_errors:
                        display.warning("Failed to install collection %s but skipping due to --ignore-errors being set. "
                                        "Error: %s" % (to_text(collection), to_text(err)))
                    else:
                        raise
def validate_collection_name(name):