Fixed failing unit tests

While building an embedded jboss has been used. But some dependencies
have been missing, which caused these unit-tests to fail.
Actions taken:
- jboss maven repositories have been added
- apacheds-server-sar: the dependency to jboss-system has been marked
  as provided
- common now has all required dependencies to bootstrap an embedded
  jboss for unitesting
Added unit test temp files to gitignore