JdbcAclService: fixes PostgreSql issue

When setup the acl tables as specified in the Spring.io documentation
I have faced the following error on a PostgreSql database:
org.postgresql.util.PSQLException: ERROR: operator does not exist:
bigint = character varying.
This is because the acl_object_identity.object_id_identity column is
of type varchar(36) but it is not necessarily accessed with a value
of type String.

- JdbcAclService / JdbcMutableAclService: SQL query must match
  object_id_identity column specification
- JdbcAclService: changed JdbcTemplate to JdbcOperations for testability
- JdbcAclServiceTest: Increased test coverage,
  the integration tests using embedded db relates to this commit
cd8d2079ed

Fixes gh-5508

acl/src/test/resources/db/sql/test_data_hierarchy.sql

@@ -0,0 +1,17 @@
+--- insert ACL data
+INSERT INTO ACL_SID (ID, PRINCIPAL, SID) VALUES
+    (10, true, 'user');
+
+INSERT INTO acl_class (id, class, class_id_type) VALUES
+    (20,'location','java.lang.String'),
+    (21,'org.springframework.security.acls.jdbc.JdbcAclServiceTests$MockLongIdDomainObject','java.lang.Long'),
+    (22,'org.springframework.security.acls.jdbc.JdbcAclServiceTests$MockUntypedIdDomainObject',''),
+    (23,'costcenter','java.util.UUID');
+
+INSERT INTO acl_object_identity (id, object_id_class, object_id_identity, parent_object, owner_sid, entries_inheriting) VALUES
+    (1,20,'US',NULL,10,false),
+    (2,20,'US-PAL',1,10,true),
+    (3,21,'4711',2,10,true),
+    (4,21,'4712',2,10,true),
+	(5,22,'5000',3,10,true),
+    (6,23,'25d93b3f-c3aa-4814-9d5e-c7c96ced7762',5,10,true);