Specs test running does not recursively descend packages to locate test to run

When I specify a package of specs tests to run, test in direct sub-packages are picked up, but deeper packages are skipped.
I found a similar issue discussed about the ScalaTest runner some months back, and the fix is equally simple.

Details are logged in SCL-2619, and I've attached a small patch to fix it to the issue.

Cheers,
Maarten