Make RedisConnectionProxy public.

RedisConnectionProxy is now public so it can be used properly for Java proxy creation across different class loaders. Previously, creating a Java proxy from a different class loader failed because of visibility/access restrictions.

Closes #2016

Author: mp911de

src/main/java/org/springframework/data/redis/core/RedisConnectionUtils.java

@@ -626,7 +626,7 @@ public void clear() {
 	 * @since 2.4.2
 	 * @see RedisConnectionUtils#getTargetConnection(RedisConnection)
 	 */
-	interface RedisConnectionProxy extends RedisConnection, RawTargetAccess {
+	public interface RedisConnectionProxy extends RedisConnection, RawTargetAccess {
 
 		/**
 		 * Return the target {@link RedisConnection} of this proxy.

src/test/java/org/springframework/data/redis/core/RedisConnectionUtilsUnitTests.java

@@ -104,14 +104,15 @@ void getConnectionShouldBindConnectionToTransactionScopeWithReadOnlyTransaction(
 		assertThat(TransactionSynchronizationManager.hasResource(factoryMock)).isFalse();
 	}
 
-	@Test // DATAREDIS-891
+	@Test // DATAREDIS-891, GH-2016
 	void bindConnectionShouldBindConnectionToOngoingTransactionScope() {
 
 		TransactionTemplate template = new TransactionTemplate(new DummyTransactionManager());
 
 		template.executeWithoutResult(status -> {
 
-			assertThat(RedisConnectionUtils.bindConnection(factoryMock, true)).isNotNull();
+			assertThat(RedisConnectionUtils.bindConnection(factoryMock, true))
+					.isInstanceOf(RedisConnectionUtils.RedisConnectionProxy.class);
 			assertThat(TransactionSynchronizationManager.hasResource(factoryMock)).isTrue();
 			assertThat(RedisConnectionUtils.getConnection(factoryMock)).isNotNull();