Update TODO

Signed-off-by: Olaf Kirch <okir@suse.de>
selftest/all: referenced itself, so we'd selftest ourselves forever...

Signed-off-by: Olaf Kirch <okir@suse.de>
selftest/functions: do not override CLAIM_TIMEOUT if it is set already

Signed-off-by: Olaf Kirch <okir@suse.de>
testbus-run: try to be a bit more flexible in locating the config file

Allow using testbus-run to execute sub-tests of a test suite, e.g.
  testbus-run nfs.exports
should run /usr/share/testbus/suites/nfs.exports but pick up the "nfs.conf"
config file.

Signed-off-by: Olaf Kirch <okir@suse.de>