GUI: disable all hyperlinks in perun tables

- this feature was no used and causes problems when loading data.
Merge pull request #509 from zlamalp/group

GUI: disable all hyperlinks in perun tables
GUI: do not display consolidator if return same set of users as last time.
Merge pull request #510 from zlamalp/registrar

GUI: don't display consolidator if same set of users was found
GUI: search for similar users only when form is defined

- Search for similar users only when application form
  is returned and non-empty.
Merge pull request #511 from zlamalp/registrar

GUI: search for similar users only when form is defined
GUI: prevent double loading application form after submission.
Merge pull request #512 from zlamalp/form

GUI: prevent double loading application form after submission.
New method getHostsByHostname

  - add to facilities managers (api,bl,impl)
  - add to rpc (facilitiesMethods)
  - special behavior for facilityAdmin (remove all hosts from facilities
    which this principal has not in authorized facilities)
Merge pull request #513 from stavamichal/getHostsByHostname

New method getHostsByHostname
Fix for method getHostsByHostname

 - problem with authorization if PerunAdmin is also FacilityAdmin
Merge pull request #514 from stavamichal/fixForGetHostsByHostname

Fix for method getHostsByHostname
make engine ignore facilities (for testing of new engine)

{alcor,aldor,ascor,torque}.ics.muni.cz
Lower number of gen workers in Engine

- Due to new functionality with preferred unix GID, gen services using
	this new attribute takes more time to get data therefore generating
	process ends on apache timeout.
- This patch lowers number of gen workers. Hopefully this decrease stress
	on core and even passwd gen services returns data before apache
	timeout.