ldapadmin - finishing testsuite related to user update
ldapadmin - only automatic reindent of file

fixing tab/spaces mix
ldapadmin - UsersController's delete operation testsuite

finishing UsersController testsuite, leveraging the package to 92%
coverage (73% overall).
ldapadmin - testsuite for UserUtils

The Validation class needs rework, because for now, it is hard to tell
in which state the required fields member variable is in. Tests results
(when removing the @Ignore annotation) is unpredictable.