Move test data into Maven's test resouces folder

Maven suggests the use of a common directory layout [1] and sticking to
it makes some things easier. Moving the sample files for Coloc 2's unit
tests into the expected src/test/resources/, makes those files loadable
again in a current Eclipse and/or Maven setup. The relative file names also get
shorter when referenced from within the tests.

[1] http://maven.apache.org/guides/introduction/introduction-to-the-standard-directory-layout.html