Removed the content-identity-auth-2_0 filter.
Removed the JacksonJaxbTransform since it was only in use by the content-identity-auth-2.0.
Removed the now unnecessary service-authentication filter.
Merge pull request #1191 from rackerlabs/REP-1248_Remove_content-identity-auth-2_0

REP-1248 Removed the content-identity-auth-2.0 filter.
Added filter file, test file, and POM
Set up filter structure in poms and web fragment
Changed filter to initially just have init, doFilter, and destroy
Updated the POM to have JAXB goodness and standard filter dependencies.
Added the JAXB bindings, schema, and example config.
Fleshed out a basic filter.
Added Lazy Logging and Mockrunner support to the HERP filter.
Removed the Servlet API 3.0 check from the HERP filter.
Updated the HERP filter test to actually run through one time and added the Log4J 2.x configuration file for the test context.
Added JSON support and swapped Mockrunner for Spring-Test in the HERP POM.
Updated the HERP test to use Spring-Test.
Started fleshing out the JSON return for the Atom event.