configNetwork: fix handleBondings regression

during the rebase destroy was not updated to its new name of
destroyOnRemoval. This patch fixes that.

Patch Set 2:
- Added a functional test to catch this sort of problem in the
  future.
Patch Set 3:
- Fixed arguments.

Patch Set 4:
- Added extra tests.

Patch Set 5:
- Improvement on the tests.

Patch Set 6:
- Fixed pep8.

Patch Set 7:
- simplified pinger.

Patch Set 8:
- Cleaned the pinger implementation.

Change-Id: I19dc94938be094bfe990301aab49a1ddc01e72fc
Signed-off-by: Antoni S. Puimedon <asegurap@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/15902
Reviewed-by: Dan Kenigsberg <danken@redhat.com>