RunQueriesInVmcTest: added setup method, and deleted redundant set-up
code from test methods; added new runQuery method, and simplified
queryFrom, deleteFrom & insertInto, by calling it; also modified
insertInto, with insertJsonValues now optional; added new queryCount
method (also calling runQuery), and queryCountAllTablesAndViews test
method (which calls queryCount); deleted EchoingPageChangeListener
(class) and myFirstTest (test method), which were moved to (& modified
in) new NavigatePagesTest class; simplified & renamed
printStoredProcInfo (formerly printTableViewAndStoredProcInfo);
commented out printVoterQueryResults, and deleted printSomeValues.