Rally does not support create verifier from gerrit source

[Bin Bin Cong]

I tried to use rally to create a tempest verifier whose source code is from gerrit, but it failed with below error:

rally verify create-verifier --name neutron-tempest --type tempest --source ssh://<email address hidden>:294/tempest --version testbranch
2017-12-11 08:44:35.637 42 INFO rally.api [-] Creating verifier 'tempest'.
Source path 'ssh://<email address hidden>:294/tempest' is not valid.

I checked the code and it seems that the URL reg can only accept a http or https link, but not a ssh link. I think ssh link should also be accepted since it is the common way to clone code from gerrit.

URL_RE = re.compile(
    r"^(?:http|ftp)s?://" # http:// or https://
    r"(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+" # domain
    r"(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|" # domain
    r"localhost|" # localhost
    r"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})" # IP
    r"(?::\d+)?" # optional port
    r"(?:/?|[/?]\S+)$", re.IGNORECASE)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/529005
Committed: https://git.openstack.org/cgit/openstack/rally/commit/?id=4dd502bb61859b1ded2544adff998e3c0495db47
Submitter: Zuul
Branch: master

commit 4dd502bb61859b1ded2544adff998e3c0495db47
Author: BinBin Cong <email address hidden>
Date: Tue Dec 12 14:08:03 2017 +0800

    Add support for ssh source

    For gerrit, it only support ssh source, with this patch,
    you can use gerrit link ssh source for verification adding.

    Change-Id: I9b0e98008f624113fcdf29b62e66f983407035e5
    Closes-Bug: #1737529