Revert r1584800.
It was:
Fix http://issues.apache.org/bugzilla/show_bug.cgi?id=56283
Add Java 8 support to Jasper's default configuration

It does not compile with JDK 1.5.0_20:
There is a problem with org.eclipse.jdt.core.compiler.IProblem class (imported by Jasper's JDTCompiler)
[javac] class file has wrong version 50.0, should be 49.0

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@1584806 13f79535-47bb-0310-9956-ffa450edef68