DERBY-6383(Update trigger defined on one column fires on update of other columns)

Backporting more junit tests from trunk for checking the affects of adding/dropping columns to the table with update triggers defined on it



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.10@1541245 13f79535-47bb-0310-9956-ffa450edef68