ISSUE-200 add page and functions for email addresses

...du/kit/scc/webreg/entity/identity/EmailAddressStatus.java

...cc/webreg/entity/identity/IdentityEmailAddressEntity.java

.../webreg/service/identity/IdentityEmailAddressService.java

.../kit/scc/webreg/service/identity/IdentityServiceImpl.java

...main/java/edu/kit/scc/webreg/bean/EmailAddressesBean.java

bwreg-webapp/src/main/resources/msg/messages_de.properties

bwreg-webapp/src/main/resources/msg/messages_en.properties

bwreg-webapp/src/main/resources/msg/messages_fr.properties

...ebapp/src/main/webapp/user/delete-all-personal-data.xhtml

bwreg-webapp/src/main/webapp/user/email-addresses.xhtml

...bapp/src/main/webapp/user/unlink-and-delete-account.xhtml

...in/java/edu/kit/scc/webreg/exc/VerificationException.java