Add object type to test_getattr obdo, so it works with obdfilter.
Fix up threading again, for "asked-for-threads-but-not-running-threads" case.

Also update runtests to do setup and cleanup with an XML file as a parameter.
Allow the llecho.sh script to build a config that will run on two separate
hosts if desired.

Convert scripts over to new setup methods where possible to avoid them
becoming increasingly outdated.  Some scripts are already broken, and
I don't use them so I'm not sure whether to remove them or fix them.

Scripts updated are llmount.sh, llrmount.sh, llecho.sh, lldlm.sh,
llmount-client.sh and llmount-server.sh.  They use the default config
scripts net*.cfg, obd*.cfg, ldlm.cfg, mds.cfg as needed to do the same
thing they used to do.

some notes about the 'runtests' test.