Fix unit tests by using synchronous job executor & mocks.

Merge branches 'ConsumeTaxService' and 's10-run-job' of https://github.com/cegeka/batchers into ConsumeTaxService

Conflicts:
	taxcalculator/pom.xml
	taxcalculator/taxcalculator-batch/src/main/java/be/cegeka/batchers/taxcalculator/batch/EmployeeJobConfig.java