DERBY-534: Support use of the WHEN clause in CREATE TRIGGER statements

Add a test case to verify that the WHEN clause SPS is invalidated and
recompiled if one of its dependencies requests a recompilation.

git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1529145 13f79535-47bb-0310-9956-ffa450edef68