Rest host assertions fail in python-compute repo

[parthea]

PR https://github.com/googleapis/gapic-generator-python/pull/1148/files introduced a feature to add https:// as a prefix for host, however the test below fails when there is a rest transport.

gapic-generator-python/gapic/templates/tests/unit/gapic/%name_%version/%sub/test_%service.py.j2

Lines 2326 to 2333 in f59917f

	def test_{{ service.name|snake_case }}_host_no_port():
	{% with host = (service.host|default('localhost', true)).split(':')[0] %}
	client = {{ service.client_name }}(
	credentials=ga_credentials.AnonymousCredentials(),
	client_options=client_options.ClientOptions(api_endpoint='{{ host }}'),
	)
	assert client.transport._host == '{{ host }}:443'
	{% endwith %}

In PR googleapis/python-compute#218 unit tests are failing an assertion for assert client.transport._host where there is logic that adds https:// as a prefix to host but the assertions do not reflect this change. See code snippet below and build log here.

def test_vpn_gateways_host_no_port():
        client = VpnGatewaysClient(
            credentials=ga_credentials.AnonymousCredentials(),
            client_options=client_options.ClientOptions(
                api_endpoint="compute.googleapis.com"
            ),
        )
>       assert client.transport._host == "compute.googleapis.com:443"
E       AssertionError: assert 'https://comp...oogleapis.com/' == 'compute.googleapis.com:443'
E         - compute.googleapis.com:443
E         ?                       ----
E         + https://compute.googleapis.com/
E         ? ++++++++