D-Net

[Trunk | Claims]: springContext-claims.xml: Added default value for sslProtocols to null (if property does not exist).

Clean up code use only the method to get managers without session cookie
add more checks if community is enabled for notifications or not

temporal fix for log4j build fail

get managers list: update the methods - add new properties

[Trunk | Claims Service]:
1. Metrics.java: New entity for Metrics.
2. MetricsHandler.java: Handler for metrics to create queries via QueryGenerator for saving and fetching metrics and execute them.
3. QueryGenerator.java: Queries for metrics added (not all of them are used - created for testing)....

[Trunk | Claims Service]:
1. springContext-claims.properties: Updated "services.claims.mail.openaireCommunityClaimsPage" and "services.claims.mail.manageCommunityUserNotificationsPage" to use the new admin portal urls (Admin portal redesign).
2. EmailSender.java: Build urls by replacing "{community}" with openaire_id in "openaireCommunityClaimsPage" and "manageCommunityUserNotificationsPage" properties, (Admin portal redesign - new urls).

[Trunk | Claims Service]:
1. ManagerUtils.java: Added method "isCommunityManager()" to check if a user_email is among managers of a community.
2. springContext-claims.xml: Added in bean with id=emailSender, property name="managerUtils" and removed property name="communityUtils".

[Trunk | Claims Service]:
1. ManagerUtils.java: [NEW] File for getting community managers from registry service added.
2. springContext-claims.properties: Property "services.claims.registryAPIForManagerEmails" added - URL of registry service for requesting community manager emails....

Updates to Migrate community claims from Beta to Production

CommunityUtils:
chnage methods from static, add it with autowired in EmailSender
update properties

Update email Sender and Scheduler:

rename property emailScheduler.sendEmailNotifications to services.claims.mail.sendEmailNotifications

Add properties to enable/disable notifications for specific entities:
services.claims.mail.notifyCommunityManagers
services.claims.mail.notifyProjectManagers