ISSUE-206 Add important properties to user classes, first job classes

...s/src/main/java/edu/kit/scc/webreg/entity/UserEntity.java

...vice/src/main/java/edu/kit/scc/webreg/job/UserExpire.java

...in/java/edu/kit/scc/webreg/job/UserExpireSendWarning.java

...src/main/java/edu/kit/scc/webreg/service/UserService.java

...java/edu/kit/scc/webreg/service/impl/UserServiceImpl.java

...kit/scc/webreg/service/oauth/client/OAuthUserUpdater.java

...u/kit/scc/webreg/service/oidc/client/OidcUserUpdater.java

...ain/java/edu/kit/scc/webreg/service/impl/UserUpdater.java

...edu/kit/scc/webreg/service/user/UserLifecycleManager.java

...java/edu/kit/scc/regapp/mail/impl/TemplateMailSender.java

...a/edu/kit/scc/webreg/tools/IdentityUserPrefsResolver.java