refactored DataAdapter by removing event related code
src/java/de/fhworms/ztt/charger/core/AbstractDataService.java
src/java/de/fhworms/ztt/charger/core/DataAdapter.java
src/java/de/fhworms/ztt/charger/core/DataAdapterListener.java
src/java/de/fhworms/ztt/charger/core/DualDataService.java
src/java/de/fhworms/ztt/cpr400/adapters/evtfile/EventFileAdapter.java
src/java/de/fhworms/ztt/cpr400/adapters/opc/OPCAdapter.java
tests/testlib/java/de/fhworms/ztt/charger/core/DataServiceDummyAdapterWrapper.java
