rally Dockerfile does not take effect from committed change

[huikang]

Problem description: if a commit change anything in rally-ovs, the rally Dockerfile can not receive the new update. This is because rally Dockerfile clones the repo form upstream.

Then a following PR is needed to fix this issue, e.g., #53 .

One possible solution is to generate Dockerfile dynamically, using jinja2 tempate.

[mestery]

@huikang Is this still relevant now that #53 has merged?

[huikang]

@mestery Yes, this is because rally Dockerfile contains the link to this ovn-scale-test repo. We should fix this later.
But, lets keep this as an open issue so it will not get lost. Thanks.

[huikang]

Lets keep this issue open for some time to ensure it works for everyone