Add support for web-jar resources

Include resource mapping for web-jar resources.

Issue: #55752928
Delegate ClassLoader with Tomcat

Use standard class loading delegation with Tomcat.
Fix JSP EL support with Tomcat

Fix TomcatEmbeddedServletContainerFactory to set a MERGED_WEB_XML
attribute when JSPs are used. This is required for EL support with
JSPs since Jasper checks the version number in the web.xml. Without
any web.xml Jasper default to disabling EL.

Issue: #55752948
Fixing typo in the documentation that incorrectly named a property.

The spring property should have been spring.profiles.active instead of
spring.active.profiles.
Merge pull request #37 from adrianpillinger/master

# By Adrian Pillinger
* pull37:
  Fixing typo in the documentation that incorrectly named a property.