New method getDestinations(sess)

- added new method getDestinations(PerunSession sess) into ServiceManager
- added into RPC enum
getExtSourceAttributes moved to getExtSourceById

- getExtSourceAttributes erased and all its functionality is now in
  getExtSourceById
- added new mapper for attributes from table ext_sources_attributes
- setAttribute method added into ExtSource object
Added test for getDestinations
checkAttributeValue for host added to rpc

- also, in checkAttributeValues RpcExceptionMessage changed
new tool copyRegMails allowed to copy notification mails related
to registration. Tool copyForm is updated to allow copy registration
Form together with notification mails.
Merge pull request #436 from zoraseb/copyregmails

CLI tools to copy application form items and notification mails

- CLI tool to copy application form between VOs and Groups.
- CLI tool to copy application mails between VOs and Groups.
- When copying application form items, you can copy mails too using -m.
Merge pull request #432 from Natrezim/extSourceRebase

getExtSourceAttributes() moved to getExtSourceById()

- getExtSourceAttributes() erased and all its functionality is now in getExtSourceById().
- added new mapper for attributes from table ext_sources_attributes.
- setAttribute() method added into ExtSource object.
Merge pull request #406 from Natrezim/getDestinations

New method getDestinations(sess)
GUI: allow application verification only to Perun admins

- VO/Group manager can no longer verify submitted application
  (verify email address). Only PerunAdmin can.
Merge pull request #441 from zlamalp/valid

GUI: allow application verification only to Perun admins
Merge pull request #433 from Simcsa/rpc

checkAttributeValue() for host added to RPC
Add new attributes to initializing in AttributesManagerImpl

- add new attribute initializing vo_core_createdAt
- add new attribute initializing group_def_lastSynchronizationState
- add new attribute initializing group_def_lastSynchronizationTimestamp
- add all setDisplayName parts
- add some setDescription parts
Merge pull request #421 from stavamichal/addAutocreatingOfVoCoreAttributeCreatedAt

Add new attributes to initializing in AttributesManagerImpl
REGISTRAR: added support for tags with links using google authz

- Added tags: {perunGuiUrlGoogle}, {validationLinkGoogle},
  {invitationLinkGoogle} and {appDetailUrlGoogle}.
- Updated javadoc.
Merge pull request #443 from zlamalp/google

REGISTRAR: added support for tags with links using google authz
Fix error message

Message was broked in bd37b8bb60a2dd8c1acd183d40aa73d82096983d