Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=57142
JSP page imports must be exposed to EL via ImportHandler

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc8.0.x/trunk@1644524 13f79535-47bb-0310-9956-ffa450edef68
Refactor test to stop IDE complaining about possible NPEs.
Also requires slightly less code.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc8.0.x/trunk@1644525 13f79535-47bb-0310-9956-ffa450edef68