* mandos-ctl: Move all command classes into a class acting as a namespace. Remove "Cmd" suffix from command class names. All users of commands changed. Also unify all tests of base commands into one test class. (command): New. (TestBaseCommands): New. (TestIsEnableCmd, TestApproveCmd, TestDenyCmd, TestRemoveCmd, TestDumpJSONCmd, TestPrintTableCmd): Remove; move tests into TestBaseCommands.