OZG-3625 delete all commands

...java/de/itvsh/ozg/pluto/command/CommandExecutedEvent.java

pluto-server/pom.xml

...java/de/itvsh/ozg/pluto/command/CommandEventListener.java

...in/java/de/itvsh/ozg/pluto/command/CommandRepository.java

.../main/java/de/itvsh/ozg/pluto/command/CommandService.java

...de/itvsh/ozg/pluto/common/search/SearchEventListener.java

.../java/de/itvsh/ozg/pluto/vorgang/VorgangDeletedEvent.java

...java/de/itvsh/ozg/pluto/vorgang/VorgangEventListener.java

.../main/java/de/itvsh/ozg/pluto/vorgang/VorgangService.java

.../de/itvsh/ozg/pluto/command/CommandEventListenerTest.java

...a/de/itvsh/ozg/pluto/command/CommandRepositoryITCase.java

...t/java/de/itvsh/ozg/pluto/command/CommandServiceTest.java