Make default Java version for JSPs Java 6

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1579171 13f79535-47bb-0310-9956-ffa450edef68
Update JDT to P20140317-1600 to add Java 8 support and enable "1.8" as a valid option for source and target JVM versions for JSPs.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1579176 13f79535-47bb-0310-9956-ffa450edef68