LMS-597 Testing framework and first tests.

...ic/client/web/client/application/AbstractGWTTestCase.java

...client/web/client/application/CallbackClassCondition.java

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

...is/generic/client/web/client/application/GWTTestUtil.java

...ric/client/web/client/application/ICallbackCondition.java

...s/generic/client/web/client/application/ITestCommand.java

...ent/web/client/application/ITestCommandWithCondition.java

.../generic/client/web/client/application/RemoteConsole.java

...eneric/client/web/client/application/ui/LoginCommand.java