Update waitForBuildDeletion() to protect against delete race
Update waitForBuildDeletion() to protect against delete race

Move glob into its own loop, protecting again us racing the filesystem
to delete files.

Change-Id: I5d62baddacf4fc41a2412883378925068f9e9f2d
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

Tesora/tesora-nodepool,Tesora/tesora-nodepool