GH-3272: Add lease renewal for distributed locks

Fixes https://github.com/spring-projects/spring-integration/issues/3272

* Introduce a `RenewableLockRegistry` since not all `LockRegistry` implementations
provide a way to renew the lease for the lock
* Implement `RenewableLockRegistry` in the `JdbcLockRegistry`
* Test and document the feature

spring-integration-core/src/main/java/org/springframework/integration/support/locks/RenewableLockRegistry.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.integration.support.locks;
+
+/**
+ * A {@link LockRegistry} implementing this interface supports the renewal
+ * of the time to live of a lock.
+ *
+ * @author Alexandre Strubel
+ * @author Artem Bilan
+ *
+ * @since 5.4
+ */
+public interface RenewableLockRegistry extends LockRegistry {
+
+	/**
+	 * Renew the time to live of the lock is associated with the parameter object.
+	 * The lock must be held by the current thread
+	 * @param lockKey The object with which the lock is associated.
+	 */
+	void renewLock(Object lockKey);
+
+}