log4j2 integrated + uoa-global-parent
[Trunk | Claims]:1. db_script.sql: Comment existing commands and add commands for creating metrics table and intialize it with empty values.2. NotificationHandler.java: [Bug fix] In logger set NotificationHandler.class.3. QueryGenerator.java: Remove unnecessary log.
-Remove methods and classes used for the migration from old database schema to new-Remove communities XMLs-rearrange packages (remove 'migration' and 'claimsDemo') Properties paths didn't change!
NotificationHandler.java & EmailSender.java: bug fix in calculating seconds (store 12:00 and add 1 sec to last_interaction_date when sending email).
1. Add entity 'Notification': pairs of mail-openaireId, with the preferences for notifications of this user for this id.2. Add FetchNotificationHandler and NotificationHandler for 'Notification' entity.3. springContext-claimsDemo.xml: Add beans for FetchNotificationHandler, NotificationHandler, defaultFrequencyInHours....