Normalize url without port with schema default port

In function get_bare_url, it will assert url startswith base_url,
if base_url is 'http://neutron.openstack.svc.cluster.local:80/',
while url is 'http://neutron.openstack.svc.cluster.local/v2.0/router/...',
it will raise error. here need to add default schema port 80 to url to
fix this problem.

Change-Id: I44d623d3d0d96711f7ca93fc24b40c024dd86446
Closes-Bug: #1829962
2 files changed