Add assert statements for Volume Pagination test to get passed
Add assert statements for Volume Pagination test to get passed

In the endpoint for http and https, Keystone has explicit
port number.

So, added assert statements by using urlparse for parsing the
hostname, path and scheme of the url.

Change-Id: I38d875c36ba72fd49f9e9f6fbd9ca3160f4821a6
Closes-Bug: #1838530

masayukig/tempest,openstack/tempest,cisco-openstack/tempest,masayukig/tempest,openstack/tempest,cisco-openstack/tempest