bug 948151: Use SITE_URL instead of 'self' in CSP
bug 948151: Use SITE_URL instead of 'self' in CSP

Use SITE_URL, such as 'https://developer.mozilla.org' instead of 'self'
in CSP rules, so that reports won't be generated when loading alternate
domain names like the origin URL.

a2sheppy/kuma,jwhitlock/kuma,escattone/kuma,mozilla/kuma,mozilla/kuma,jwhitlock/kuma,SphinxKnight/kuma,a2sheppy/kuma,Elchi3/kuma,Elchi3/kuma,SphinxKnight/kuma,jwhitlock/kuma,a2sheppy/kuma,escattone/kuma,SphinxKnight/kuma,a2sheppy/kuma,escattone/kuma,SphinxKnight/kuma,a2sheppy/kuma,jwhitlock/kuma,Elchi3/kuma,mozilla/kuma,SphinxKnight/kuma,Elchi3/kuma,SphinxKnight/kuma,Elchi3/kuma,mozilla/kuma,mozilla/kuma,jwhitlock/kuma