OZG-582 send mail and listen for sent event

mail-service/pom.xml

...vice/src/main/java/de/itvsh/ozg/mail/MailSendRequest.java

...ervice/src/main/java/de/itvsh/ozg/mail/MailSentEvent.java

...test/java/de/itvsh/ozg/mail/MailSentEventTestFactory.java

pluto-server/pom.xml

.../main/java/de/itvsh/ozg/pluto/PlutoServerApplication.java

...de/itvsh/ozg/pluto/vorgang/redirect/RedirectListener.java

.../de/itvsh/ozg/pluto/vorgang/redirect/RedirectService.java

...sh/ozg/pluto/vorgang/redirect/VorgangRedirectedEvent.java

...r/src/test/java/de/itvsh/ozg/pluto/TestConfiguration.java

...tvsh/ozg/pluto/vorgang/redirect/RedirectListenerTest.java

...itvsh/ozg/pluto/vorgang/redirect/RedirectServiceTest.java