Add Test containers for test cases

[rtclauss]

Note that some tests may fail. If you want to skip the tests add -DskipTests=true as part of your build.

Also, I've added a startup bean in 7b54dcf which creates the necessary indexes in CouchDB to improve performance when there is a lot of content in the CouchDB.

[jwalcorn]

In general, I like it - thanks for adding these tests, and automatically making that index. I do see some random line of output in the readme where it shows how to invoke stuff (line 66), that should be cleaned up. Also not sure why the mention of the option to run CouchDB in a VM in the cloud got removed from the readme; if I use the Azure portal to request a CouchDB deployment, it is indeed a VM in the cloud. Lastly, unless I'm misunderstanding stuff, I don't see it actually checking if CouchDB is available in the CouchDBReadinessTest (it seems to be the same as the NoCouchDBReadinessTest)

[rtclauss]

I added additional clarification to the README.md.

The difference between CouchDBReadinessTest and NoCouchDBReadinessTest is that the first test scenario starts up CouchDB testcontainer, then tests the health check endpoint to verify that the health check has passed while the second scenario does not start CouchDB and verifies that the health check fails.

I've updated the Javadocs in the most recent commit.

[jwalcorn]

Looks good now. Thanks!