Remove dependency on external XDS repository and PDQ for the unit tests

[bmehner]

Currently the tests in coala-ipf subsystem are dependent on external running systems providing XDS and PDQ interfaces.

Thus these tests are integration tests and not self-contained. There are two possible solutions for this:

• Either we rewrite them to be real unit tests not interacting with external systems
• Or we provide a mock implementation for the corresponding IHE providers that get started automatically by each test

Prerequisite for this is issue #18.

i tend to have a mock implementation here, acting as a IHE conformant Registry/Repository. Is there a set of common interfaces ensuring no need to touch our current implementation?

[bmehner]

I think we need both. In coala-communication we can replace the references to coala-ipf-pdq and coala-ipf-xds with some mocking on basis of easymock.

In coala-ipf-* we need some actual lightweight mock implementation. I hope we can do this with the help of IPF to implement some quite dumb memory mocks for this.

For example the PDQ result could always be the same one patient regardless of the search parameter. And the XDS repository and registry could store BPPC documents in memory.

[bmehner]

For the time being I have deactivated the tests. This way the build is working again.