DERBY-5749 Implicit cast of variable length values, e.g. as arguments to stored methods and generated columns values, silently truncate if too long 

merge tests from revision 1339281



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.8.3.1_testcompat@1466164 13f79535-47bb-0310-9956-ffa450edef68