idp-Integration-tests

[Rod Widdowson]

This is probably for Tom.

Now that Jetty logs to disk rather than to stdout, the trick we used for
doing a popen("jetty") and waiting for the "I'm started" messages, doesn't
work to good.

I've have checked in a bit of a "patch" (pronounced "hack") to get around
that: we continually wait for the log to exist and then for the "I'm
started" line.  We then have to delete the log when we kill the process.
This appears to work locally, but I'd be glad of some review of the code.

Longer term there is probably a better way to wait for jetty to be started:
maybe we can ping the status page?

R