Add tests for new code from the operator SDK

[jpkrohling]

As a follow up from #116, new unit tests are needed for the parts that were added as part of the new operator SDK, like the jaeger_controller.go. This requires some research in understanding how to deal with the Kubernetes Client in tests.

[jpkrohling]

Reference: https://github.com/operator-framework/operator-sdk-samples/blob/master/memcached-operator/pkg/controller/memcached/memcached_controller_test.go