pep8: Fix indentation to comply with pep8 1.3.3

Commit 2c9f0d66db7795 introduced a pep8 indentation regression, breaking
the build on RHEL using vdsm provided pep8. This patch fixes the
indentation by breaking long statement to multiple lines.

Change-Id: I3431742f9dbfd86a9816c7b3c6de90e282dbd415
Relates-To: https://bugzilla.redhat.com/1022975
Signed-off-by: Nir Soffer <nsoffer@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/21055
Reviewed-by: Antoni Segura Puimedon <asegurap@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>