SelfHoster: Avoid some compiler warnings.

SelfHoster: Avoid some compiler warnings.

* src/test/java/org/glom/web/server/SelfHoster.java
executeCommandLineAndWait():
executeCommandLineAndWaitUntilSecondCommandReturnsSuccess(): Comment out
the now-unused streams for stdout and stderr from the command Processes.
These are not used because readln() hangs while waiting for a new line,
where there may be no next line. The commented out code is still there
to help us figure out how to do this properly.