Remove usage of unittest2, use unittest from the standard library

[hroncok]

Fixes #241

Fedora is removing the unittest2 package: https://bugzilla.redhat.com/show_bug.cgi?id=1794222

tuned is not targeting Python 2.6: #241 (comment)

One thing not present in Python 2.7 is assertItemsEqual() -- renamed to assertCountEqual().

Related, mock was also listed as a requirement in the spec file,
but all the imports are from unittest.mock, hence removed.

[olysonek]

Thank you!

[olysonek]

/packit copr-build

[olysonek]

@yarda Please take a look at this.

[packit-as-a-service]

There was an error while creating SRPM. You can re-trigger build by adding a comment (/packit copr-build) into this pull request.

Output:

Preparing of the upstream to the SRPM build failed: ['oc', 'cp', 'packit-prod-sandbox/docker-io-usercont-sandcastle-20200226-103821454653:/tmp/tmp.tQpuQXDrTu/t.tar.gz', '/tmp/tmpmq8m0x4_'] failed with 'error: tmp/tmp.tQpuQXDrTu/t.tar.gz no such file or directory\n'

[olysonek]

/packit copr-build

[hroncok]

I've tried to parse the packit error, and I think it is broken, but not by this PR.

[packit-as-a-service]

Congratulations! One of the builds has completed. 🍾

You can install the built RPMs by following these steps:

• sudo yum install -y dnf-plugins-core on RHEL 8
• sudo dnf install -y dnf-plugins-core on Fedora
• dnf copr enable packit/redhat-performance-tuned-249
• And now you can install the packages.

Please note that the RPMs should be used only in a testing environment.

[olysonek]

I've tried to parse the packit error, and I think it is broken, but not by this PR.

Yes, it happens all the time. Nothing to worry about ;).

[hroncok]

Can we please get this merged so I can backport it to https://src.fedoraproject.org/rpms/tuned/pull-request/2 ? Or should I backport AS IS?

[yarda]

Thanks, merging, sorry for delay.

[hroncok]

Thank You.