Improves tests for order item base
Removes workaround for phpunit 3.4 as it's no longer supported and creates a lot of additional, empty tests
Merge https://github.com/Arcavias/arcavias-core
Moves junit log config to XML file and repeats performance tests five times
Merge pull request #261 from nsendetzky/master

Minor improvements and removes workaround for phpunit 3.4