Complete importProperties. Still really messy and ugly, but at least coverage is 100%. Missing unit test for upsert in CobrandDAO, it is indirectly tested by CobrandCreatorTest: it may make sense to unit test since it fails when both conditions are false, and such conditions does not verify right now

Change dependencies: rely on mongo-java-driver provided by Morphia, add org.apache.commons:commons-lang3:3.1