CORE,RPC,REGISTRAR: allow updating titles of users

CORE, RPC:
- Added updateNameTitles(PerunSession sess, User user) method which
  updates titles in users name. Implementation is almost same as
  updateUser() method, but updates only titles and also allow to remove
  title by setting parameter to null. Auditer message same as in
  updateUser() is logged, since it's change of User object.

REGISTRAR:
- If titles before/after name are part of application form, they are
  stored to user during application approval. Values are taken from
  items linked to "displayName" attribute and "titleBefore/titleAfter"
  attributes, which takes precedence over "displayName".
- Only non-empty titles are stored by application in order to prevent
  deletion while user is logged-in by IDP without his/hers titles
  included.
- If any of form items can't be stored to DB, exception and wrong value
  is logged and stored for notification to vo manager/user purpose.
  Password items are not logged.
- Prevent logging unnecessary exceptions when instantiating registrar
  module.
- Updated logging messages.
RPC: Deserializer now can provide its HttpServletRequest

- All RPC's deserializers now takes HttpServletRequest in constructor
- Implemented method getServletRequest() which returns request for
  which is deserializer used.
- Such request and its parameters (like URL) can be then passed to
  Perun's API methods like "parms.getServletRequest()".
- Can be used to determine "where is Perun running" on runtime
  without static configuration in perun.properties.
- Updated javadoc for all related classes.
- Fixed source formatting.
GUI: fixed filtering of applications by users name

- Fixed case when filtering by whole user's name didn't
  returned any applications, even thou they were
  present in table.
Merge pull request #136 from zlamalp/appfix

GUI: fixed filtering of applications by user's name
Core: attribute U:D:sshPublicKey can be null

Null in value is allowed in the module for U:D:sshPublicKey.

We still don't have something like "optional" attributes for service. So
for this attribute we still need to allow null value in module therefore
the services can mark it as "required" and GEN script must be ready to
get null in this attr.

For services that really reuires not null ssh key, we temporary use
U:D:sshPublicAdminKey attribute.
REGISTRAR: use parsed name when searching for similar users

- When searching for similar users (before new application approval)
  try to parse display/commonName in order to remove wrong input.
  Name titles are dropped from search to provide wider search results.
  If parsing name fails, log, ignore and try to search by whole input.
Merge pull request #137 from zlamalp/reg

REGISTRAR: use parsed name when searching for similar users