More tests for fuel_agent.utils.grub_utils

[Vladimir Kozhukalov]

We need thoroughly test grub_utils in order to avoid regression like this https://bugs.launchpad.net/fuel/+bug/1452046 in the future.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/200560

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/201555

[OpenStack Infra (hudson-openstack)]

Change abandoned by Aleksandr Gordeev (<email address hidden>) on branch: master
Review: https://review.openstack.org/200560
Reason: resubmitted to stackforge/fuel-agent

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/201555
Committed: https://git.openstack.org/cgit/stackforge/fuel-agent/commit/?id=3c02dbf2e9f6049d784fac6b0b1b834d243a41b3
Submitter: Jenkins
Branch: master

commit 3c02dbf2e9f6049d784fac6b0b1b834d243a41b3
Author: Alexander Gordeev <email address hidden>
Date: Fri Jul 10 17:08:48 2015 +0300

    IBP: add more tests for fuel_agent.utils.grub

    * improve test coverage;
    * add exception raising for methods which should return something;

    Change-Id: I4aa7ee05e37c8a7935d8759875f76f98d30388fa
    Closes-Bug: #1452158

[Alexander Gordeev (a-gordeev)]

all needed tests were implemented. So moving to 'fix released'