Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=56582
Convert implementations of ActionHook.action(..) to use switch(enum) operator.
Part 1/2: AJP processors.

It is backport of r1599395 from tomcat/trunk.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1599505 13f79535-47bb-0310-9956-ffa450edef68