OPENJPA-2387: Fix to exclude schema name when checking the length of a sequence name.

git-svn-id: https://svn.apache.org/repos/asf/openjpa/branches/2.2.x@1504720 13f79535-47bb-0310-9956-ffa450edef68
OPENJPA-2355: Allow more than two input argument to CONCAT() - back ported to 2.2.x Pinaki Poddar's trunk changes.

git-svn-id: https://svn.apache.org/repos/asf/openjpa/branches/2.2.x@1505840 13f79535-47bb-0310-9956-ffa450edef68