Update Spring to Latest Version

Updated spring to latest version. There were a couple bugs in the manual tests outstanding since at least 1.6.0 that will require additional future investigation.

uw-spring-security-sample-war/src/main/webapp/index.html

@@ -29,8 +29,10 @@
   <p>Start VM with 'mvn clean install jetty:run -P preauth', visit http://localhost:8080/.</p>
   <ol>
   <li>Click 'Lazy with "ignorepreauth"', expect "anonymousUser".</li>
-  <li>Visit http://localhost:8080/index.html. Click 'Lazy authentication', expect JSON object representing UWUserDetails for 'Amy Administrator'.</li>
-  <li>Visit http://localhost:8080/index.html. Click 'Required authentication', expect JSON object representing UWUserDetails for 'Amy Administrator'.</li>
+  <li>Visit http://localhost:8080/index.html. Click 'Lazy authentication', expect JSON object representing UWUserDetails for 'Amy Administrator'.
+    Since at least 1.6.0 this has been returning "anonymousUser" instead.  Requires additional investigation to determine if there is a bug here.</li>
+  <li>Visit http://localhost:8080/index.html. Click 'Required authentication', expect JSON object representing UWUserDetails for 'Amy Administrator'.
+    Since at least 1.6.0 this has been failing with "Access denied".  Requires additional investigation to determine if there is a bug here.</li>
   </ol>
 
   <h3>combined</h3>