Added migration

Author: nickpalladino

src/main/resources/db/migration/V005.003__create_required_global_levels.sql

@@ -0,0 +1,7 @@
+-- Add rep and block global levels needed by DeltaBreed if they don't exist
+
+INSERT INTO observation_unit_level_name (level_name, level_order)
+VALUES
+    ('rep', 3),
+    ('block', 4)
+ON CONFLICT (level_name) WHERE program_id IS NULL DO NOTHING;