Revert "tests: Fix parted_utils_tests break on fedora 18"

The commit 51d76e caused a break on rhel6 host because of a bug
in parted.version(). Please see:
https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=700383
It's fixed in Fedora 14, but not backported to RHEL6. So we have to
find a workaround for the break on Fedora18.

This reverts commit 51d76e04727c2d41371eb207f02a0f84de74a140.

Change-Id: I723edbeb1fc18c0160f4cfd7d1d808fd92acf125
Signed-off-by: Mark Wu <wudxw@linux.vnet.ibm.com>
Reviewed-on: http://gerrit.ovirt.org/11136
Reviewed-by: Antoni Segura Puimedon <asegurap@redhat.com>
Tested-by: Antoni Segura Puimedon <asegurap@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>