DERBY-5342 make ScriptTestCase support "ij.showNoCountForSelect" and "ij.showNoConnectionsAtStart"

merge to 10.8 to facilitate upgrade and compatibility testing
Contributed by Houx Zhang



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.8@1465430 13f79535-47bb-0310-9956-ffa450edef68