The doc update of
HADOOP-14099 has shown that there's confusion about whether we need a src/test/resources/contract-test-options.xml file.
It's documented as needed, branch-2 has it in .gitignore; trunk doesn't.
I think it's needed for the contract tests, which the S3A test base extends (And therefore needs). However, we can just put in an SCM managed one and have it just XInclude auth-keys.xml
I propose: do that, fix up the testing docs to match