Notifications: change reverted 'subject' -> 'name'

renamed at RowMapper in PerunNotifTemplate. DB has changed.
RPC:Perl - added Command Line Tools for PN Objects

Perun Notification Objects:
- PerunNotifObject
- PerunNotifReceiver
- PerunNotifRegex
- PerunNotifTemplateMessage
- PerunNotifTemplate

For each is created following tools:
- create
- update
- remove
- get