[LMS-1257] simplified system tests RemoteConsole and some tests

...client/web/client/application/FileFormatTypeGridTest.java

...bis/generic/client/web/client/application/SearchTest.java

.../web/client/testframework/AbstractDefaultTestCommand.java

...c/client/web/client/testframework/FailureExpectation.java

...generic/client/web/client/testframework/ITestCommand.java

...ric/client/web/client/testframework/PiggyBackCommand.java

...eneric/client/web/client/testframework/RemoteConsole.java

...eb/client/application/sample/GenericSampleViewerTest.java