Update H2 DDL for JDBC Lock Registry lock table

Signed-off-by: Andreas Gebhardt <agebhar1@googlemail.com>

Author: agebhar1

src/reference/antora/modules/ROOT/pages/jdbc/lock-registry.adoc

@@ -17,11 +17,12 @@ For example, the following listing shows the H2 DDL for the lock table:
 [source,sql]
 ----
 CREATE TABLE INT_LOCK  (
-    LOCK_KEY CHAR(36),
-    REGION VARCHAR(100),
-    CLIENT_ID CHAR(36),
-    CREATED_DATE TIMESTAMP NOT NULL,
-    constraint INT_LOCK_PK primary key (LOCK_KEY, REGION)
+	LOCK_KEY CHAR(36) NOT NULL,
+	REGION VARCHAR(100) NOT NULL,
+	CLIENT_ID CHAR(36),
+	CREATED_DATE TIMESTAMP NOT NULL,
+	EXPIRED_AFTER TIMESTAMP NOT NULL,
+	constraint INT_LOCK_PK primary key (LOCK_KEY, REGION)
 );
 ----