Task #9309: added views resource_allocation.resource_claim_conflict_reason_view and resource_allocation.task_conflict_reason_view

Task #9309: added conflict_reasons, task and resource_claim relations. Added initial storage and bandwith set of conflict reasons. Added triggers to ensure db consistancy on task and resource_claim conflict status

Task #8887: added create_add_notifications.sql.py to create add_notifications.sql. Added two update notifications for resource availability and capacity

Task #8887: added view resource_monitoring.resource_view which shows availability and capacity of resources

Task #8887: added trigger function which deletes resource_claims for task when the task is updated to approved status

Task #8570: renamed dir from ResourceAssignmentDatabase to ResourceAssignmentDatabase.from_branch_to_prevent_svn_conflict to prevent svn EvilTwin merge conflict. Rename back on trunk.