Update unit tests to use mongo 3.2.4+

[jewzaam]

We have this deployed in production so would be good to test with it. Should we setup tests to run with multiple versions of mongo or is that overkill?

[dcrissman]

if I understand you correctly, you are talking about the version of the mongo server used for testing? If so, then that could be changed in the lightblue-mongo [1] project. That said, 3.2.4 is not an option even in the newest version of the 3rd party mongo library that we use. It is currently possible to change the mongo version using an annotation [2] on the test suite.

[1] https://github.com/lightblue-platform/lightblue-mongo/blob/master/test/src/main/java/com/redhat/lightblue/mongo/test/MongoServerExternalResource.java#L75
[2] https://github.com/lightblue-platform/lightblue-mongo/blob/master/test/src/main/java/com/redhat/lightblue/mongo/test/MongoServerExternalResource.java#L81

[dcrissman]

Related to lightblue-platform/lightblue-mongo#293