Delete test_handle_dib_build_gear_disconnect test
Delete test_handle_dib_build_gear_disconnect test

We no longer use gearman for image builds, so we can remove this.

Change-Id: I3bf93ebd447b5f9bc8da5b1e3394b34c147e9f5d
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

Tesora/tesora-nodepool,Tesora/tesora-nodepool