Add support for CONFIG REWRITE.

Signed-off-by: Manousos Mathioudakis <manoumathioudakis@yahoo.gr>

Closes #1992
Original pull request: #2012.

src/test/java/org/springframework/data/redis/connection/RedisConnectionUnitTests.java

@@ -983,6 +983,11 @@ class RedisConnectionUnitTests {
 			delegate.migrate(key, target, dbIndex, option, timeout);
 		}
 
+		@Override
+		public void rewriteConfig() {
+			delegate.rewriteConfig();
+		}
+
 		@Override
 		public Boolean set(byte[] key, byte[] value, Expiration expiration, SetOption options) {
 			return delegate.set(key, value, expiration, options);