D-Net

1. pom.xml: Add commented plugin for surfire (possibly needed in openjdk: bug in their release) | update version of javax.mail.
2. FetchContextHandler.java: bug fix in parsing resultset.
3. QueryGenerator.java: bug fix in query of method 'generateSelectFirstContextByCommunityIdQuery'....

springContext-claimsDemo.xml: targetHour and targetMinute beans restored (were changed for testing purposes).

1. FetchClaimHandler.java: add method fetchNumberOfClaimsByDateAndOpenaireId.
2. CommunityUtils.java: request datasource API to get community information (including managers).
3. FetchContextHandler.java: Method fetchFirstContextByCommunityId to parse name of community to be used in the above API....

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....

Parameterize context utils methods with a boolean parameter for productionIndex, add production url
In delete claims method add check for deleting record

Enable claiming for ORPs
Set direct index url in properties
Migration:
save orphan Ids, claims
uncomment fetch dedup

Change ContextUtils to get concept label from new Context API

add communities xml files| change fetching methods for communities | set properly date in migration | change ORCID API

fixing issues with ordering and types filter

close the db connection per request, in fetch claims by context id use like and wild character in order to get all claims of a community