Notifications: Fix of bugs in notifications module

- fixed parsing of Class from NotifObject - using getName() instead of toString()
- fixed bug in NotificationsListener: now the processing of perun audit messages is active.
- Debug fixes:
 - NotificationListener - eddited logger message
 - PerunNotifPoolMessageManagerImpl - fixed possible NullPointerException
 - PerunNotifPoolMessageManagerImpl - add log message in parsing method
 - PerunNotifTemplateManagerImpl    - method getTemplateById give most updated template instead the one from cache
 - PerunNotifRegexManagerImpl       - method saveTemplateRegexRelation now updates relation in template
 - PerunNotifTemplateManagerImpl    - method compileTemplate, fixed name of the template
 - Perl - updatePerunNotifTemplate  - added constraint for id attribute
- fix of updateTemplateMessage - removed return statement, edited sql statement (BUG_03)
- enhanced working with locale (BUG_05)
- update of template-regex relation - the relation between template and regex is now updating template globaly (BUG_10)
- TemplateRegexRelation managing (BUG_11)
 - repaired cyclic call of saveTemplateRegexRelation and updatePerunNotifTemplate by adding new method assignTemplateToRegex, which is now called from both methods
 - repaired wrong removing TemplateRegexRelation by creating new method removeTemplateFromRegex
 - edited parseMapWithList, so as it doesn't throw unneccessary exceptions
- removing of AuditMessages - the PerunNotifAuditMessages is now being removed from db, when not recognized (BUG_02)
- resolved deleting of receiver and template-regex relation - the receiver and template-regex relation has been deleted everytime updatePerunNotifTemplate was called - now this method do not process regexes nor receivers anymore (BUG 04, 06)
- formatting commit for notification module
- fixed bug in updateTemplate - now the updatePerunNotifObject updates the notif_trigger too
- fix of STREAM mode (BUG_13):
 - fix bug of Pool Message row mapper, which was getting the time of creation of the message in a wrong format
 - added log messages connected to STREAM mode
- fix getting emails from EMAIL_GROUP type of receiver - the email is extracted from attribute of user instead of member
- repaired updatePerunNotifTemplateMessage - the changes was not propagated to the FreeMaker cache (BUG_15)
Notifications+Perl: added new attribute of Receiver - locale

- the locale of messages is extracted from receiver's locale instead of template's locale
- the locale from template and pool message entities has been deleted