GUI: Removed cross-site scripting hack for devel

- Cross-site scripting is no longer possible for development purpose.
  Use local Apache server and Tomcat or Jetty to run Perun locally.

- New JsonClient is not limited to standard timeout of 30s and
  waits for Apache timeout/response.

- Json(Post)Client now handles 401 and 500 responses as onError().
  For 500 also determine, if it was timeout (longer than 5 minutes).

- Removed unused stuff and properties, source format.
GUI: handle also 503 error for JsonClient
GUI: handle 404 case in JsonClient

- Tomcat returns 404 HTTP status code while redeploying webapp.
- We expect, that JsonClient always call valid URL (RPC), so
  exception text inform about server being restarted.
Add topGroupCreator to method manageRole

 - topGroupCreator was not supported in method manageRole
  - add to remove part
  - add to add part
Merge pull request #548 from stavamichal/addTopGroupCreatorRoleToManageRole

Add topGroupCreator to method manageRole
TopGroupCreator can get vo by method getVoByShortname

 - add privileges for topGroupCreator to method getVoByShortname
Merge pull request #549 from stavamichal/topGrCreatorCanGetVoByShortName

TopGroupCreator can get vo by method getVoByShortname
GUI: encode query string 3 times in registrar

- When passing target_url param for consolidator link, it's
  value must be URI encoded 3 times, because consolidator
  performs 3 read (decodes).
Merge pull request #550 from zlamalp/url

GUI: encode query string 3 times in registrar
Merge pull request #546 from zlamalp/json

GUI: removed cross-site scripting hack
GUI: fixed forgotten files

- We don't use request ID anymore.
Merge pull request #551 from zlamalp/fixup

GUI: fixed forgotten files
GUI: url encode only twice for consolidator link

- Hovering above return link (button) show decoded value
  in a browser, but url used by it is still encoded.
  So use encoding only twice for identity consolidator link.
Merge pull request #552 from zlamalp/consolidator

GUI: url encode only twice for consolidator link
REGISTRAR: fixed condition in initRegistrar()

- fixed condition on retrieving VO attributes.
Merge pull request #553 from zlamalp/fix

REGISTRAR: fixed condition in initRegistrar()
TopGroupCreator can send invitation to VO

 - change in authz