Utility to switch the current site for a block.
Ensure that translated sites are using the DOWNLOAD_AGREEMENT_VERSION value from the default site.
Fix leaked/changed global state in the test suite.
Toggle the cache prefix on the test to prevent a potential cache hit from local dev.
Stop messing around with patching the settings and just mock the waffle functions.
Merge pull request #183 from mozilla/175-mulit-site-download-agreemnt

Mulit-site Download Agreement Fix