Add Jackson 2 HttpMessageConverter and View

Jackson 2 uses completely new package names and new maven artifact ids.
This change adds Jackson 2 as an optional dependency and also provides
MappingJackson2HttpMessageConverter and MappingJackson2JsonView for use
with the new version.

The MVC namespace and the MVC Java config detect and use
MappingJackson2HttpMessageConverter if Jackson 2 is present.
Otherwise if Jackson 1.x is present,
then MappingJacksonHttpMessageConverter is used.

Issue: SPR-9302

src/reference/docbook/mvc.xml

@@ -2892,7 +2892,7 @@ public String upload(...) {
   </property>
   <property name="defaultViews">
     <list>
-      <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
+      <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView" />
     </list>
   </property>
 </bean>
@@ -2924,7 +2924,7 @@ public String upload(...) {
       the <classname>SampleContentAtomView</classname> if the view name
       returned is <classname>content</classname>. If the request is made with
       the file extension <literal>.json</literal>, the
-      <classname>MappingJacksonJsonView</classname> instance from the
+      <classname>MappingJackson2JsonView</classname>instance from the
       <literal>DefaultViews</literal> list will be selected regardless of the
       view name. Alternatively, client requests can be made without a file
       extension but with the <literal>Accept</literal> header set to the
@@ -3588,7 +3588,7 @@ public String onSubmit(<emphasis role="bold">@RequestPart("meta-data") MetaData
       However, the <literal>@RequestPart("meta-data") MetaData</literal>
       method argument in this case is read as JSON content based on its
       <literal>'Content-Type'</literal> header and converted with the help of
-      the <classname>MappingJacksonHttpMessageConverter</classname>.</para>
+      the <classname>MappingJackson2HttpMessageConverter</classname>.</para>
     </section>
   </section>
 
@@ -4256,9 +4256,10 @@ public class WebConfig {
                 </listitem>
 
                 <listitem>
-                  <para><classname>MappingJacksonHttpMessageConverter</classname>
-                  converts to/from JSON — added if Jackson is present on the
-                  classpath.</para>
+                  <para><classname>MappingJackson2HttpMessageConverter</classname>
+                  (or <classname>MappingJacksonHttpMessageConverter</classname>)
+                  converts to/from JSON — added if Jackson 2 (or Jackson) is present
+                  on the classpath.</para>
                 </listitem>
 
                 <listitem>