Improve the performance of the `getMergedAnnotationAttributes` and
`isAnnotated` methods in `AnnotatedElementUtils` by returning
immediately when the element had no annotations.

Issue: SPR-13621

Issue: SPR-13621

Add new MediaType.APPLICATION_JSON_UTF8 and
MediaType.APPLICATION_JSON_UTF8_VALUE constants for
"application/json;charset=UTF-8" content type in order to make it
easier to override @RequestMapping "produces" attribute without
losing the default JSON charset (UTF-8).

Issue: SPR-13600

Issue: SPR-13621

Issue: SPR-13634

Issue: SPR-13633

Issue: SPR-13629

Issue: SPR-13633

Issue: SPR-13628

Issue: SPR-13611

Issue: SPR-13596

Issue: SPR-13600

* pr/908:
  Fix typo

Closes gh-908

Refine the approach of having <mvc:view-resolvers> detect and use the
ContentNegotiationManager instance registered with
<mvc:annotation-driven> introduced in the last commit.

Issue: SPR-13559

The <mvc:annotation-driven> element now adds an alias when a
ContentNegotiationManager bean is registered with a custom name.
This helps <mvc:view-resolvers> to more reliably find such a custom
ContentNegotiationManager.

Issue: SPR-13559

Issue: SPR-13234

Issue: SPR-13607

Prior to this change, serving resources with ResourceHttpRequestHandler
could result in NPE when requesting an existing folder located in a JAR.

This commit swallows those exceptions, as it is not possible to foresee
those cases without reading the actual resource. This result in a HTTP
200 response with a zero Content-Length instead of a HTTP 500 internal
exception.

Issue: SPR-13620

Issue: SPR-13615

Issue: SPR-13619

Issue: SPR-13353

Issue: SPR-13520

Issue: SPR-13117

Issue: SPR-8131

Issue: SPR-8129

Previously, the only way to add the collection converters to a registry
was to add *all* default converters. A new "addCollectionConverters"
public method is now available to only register them.

Issue: SPR-13618

Issue: SPR-12175
Issue: SPR-13020

Issue: SPR-13438

* pr/905:
  Fix elvis operator example

Closes gh-905

Issue: SPR-10474

Issue: SPR-13505