Issue: SPR-13353

Issue: SPR-13613

Issue: SPR-13564

As of Undertow 1.3.0, several APIs have been changed: replacing Xnio's
Pool/Pooled references to Undertow's new ByteBufferPool abstraction.
This move has been made, as part of
https://issues.jboss.org/browse/UNDERTOW-522, to prepare deprecations in
the Xnio API.

This commit adds a new strategy to deal with both 1.0-1.2 and 1.3
Undertow generations.

Issue: SPR-13366

Latest dependency updates (Hibernate ORM 5.0.1, JasperReports 6.1.1, Joda-Time 2.8.2, SnakeYAML 1.16)

Issue: SPR-13327

Issue: SPR-13002

Issue: SPR-13354

Issue: SPR-13228

Includes latest dependency updates (Jackson 2.6.1, Jetty 9.3.2, Undertow 1.2.10)

Issue: SPR-13342

Issue: SPR-13297

Issue: SPR-13283

This is necessary to ensure that the version of HtmlUnit that we use is
compatible with HttpComponents 4.5.

Issue: SPR-13158

Issue: SPR-13158

This commit introduces integration between MockMvc and HtmlUnit, thus
simplifying end-to-end testing when using HTML-based views and enabling
developers to do the following.

 - Easily test HTML pages using tools such as HtmlUnit, WebDriver, & Geb
   without the need to deploy to a Servlet container

 - Test JavaScript within pages

 - Optionally test using mock services to speed up testing

 - Share logic between in-container, end-to-end tests and
   out-of-container integration tests

Issue: SPR-13158