Improved generics for where(List) so that a list of EntityExpr will be accepted.  Fixes an issue where the runtime would select the where(Object...) method for a List of EntityExpr objects.

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1628287 13f79535-47bb-0310-9956-ffa450edef68