[referrer-policy-tests] Rename no-referrer-policy to null-referrer-policy. (#1811)

Done so not to confuse it with the explicit 'No Referrer' policy
which, quite the opposite, OMITS any referrer info to a subresource.

The null-referrer-policy is applied as a default:
When nothing was explicitly specified for the Referrer-Policy
in the settings object. The subresource receives complete referrer info.

 @mikewest, @jeisinger

View on GitHub: https://github.com/w3c/web-platform-tests/pull/1811

Received on Friday, 8 May 2015 11:41:07 UTC