These are resources used to test implementations of the evolving blockcerts certificate standard and issuer conventions.
master should be used in most cases. It hosts all the URLs on http://localhost:1234 and is up to date with current issuer & certificate standards
android is identical to master, but URLs are hosted at http://10.0.2.2:1234. This is the emulator loopback URL, since localhost points to the device itself rather than the hosting computer. And wiremock doesn't do variables.