Switch to TEMPLATE_AND_VALUES as the default mode

DefaultUriBuilderFactory now uses EncodingMode.TEMPLATE_AND_VALUES by
default. However the RestTemplate explicitly sets it to the previous
setting EncodingMode.URI_COMPONENTS, so this affects mainly the
WebClient and any direct use of DefaultUriBuilderFactory to configure
either the RestTemplate or the WebClient.

Issue: SPR-17039

spring-web/src/test/java/org/springframework/web/util/DefaultUriBuilderFactoryTests.java

@@ -160,6 +160,7 @@ public class DefaultUriBuilderFactoryTests {
 	@Test
 	public void parsePathIsTurnedOff() {
 		DefaultUriBuilderFactory factory = new DefaultUriBuilderFactory("/foo/{bar}");
+		factory.setEncodingMode(EncodingMode.URI_COMPONENT);
 		factory.setParsePath(false);
 		URI uri = factory.uriString("/baz/{id}").build("a/b", "c/d");
 		assertEquals("/foo/a/b/baz/c/d", uri.toString());