Bumped version for release of 2.1.20
Merge branch 'release/2.1.20' into develop
Bumped version for development after release.
Fixed some legacy groups where getMembers were inconsistent with isMember. Fixed senders and recipients delete().
Changed BennuGroupBridge group to have as expression just the externalId
New PersistentGroup implementations and conversion mechanism from the old group system
Removed group  translation from classes known to be deletable
Removed SupportRequests and related domain
Cleanup: Removed Library Cards
Removing Seminaries and Gauging Tests
Removed ancient TSD interfaces and domain
Removed MasterDegreeCandidate portal
Removed treasury/microPayments sections
Removed Cron and FAQ/Glossary
Refactor: Role no longer contains "portal applications"
Removed ResourceAllocationRole and GOP AccessGroups Management
Removed the 'New Tests' domain
Removed DSpace integration
Deleted PersonalGroup, it was not used
Deleted ManagementGroups, it was not used

Conflicts:
	src/main/java/net/sourceforge/fenixedu/domain/accessControl/groups/language/GroupBuilderRegistry.java
	src/main/java/net/sourceforge/fenixedu/tasks/GroupTester.java
	src/main/java/net/sourceforge/fenixedu/tasks/GroupTranslator.java