Fix Fedora 26 Jenkins nodes

[jodh-intel]

The Fedora 26 Jenkins nodes (atleast for runtime and tests) seem to be broken. Every new PR is failing on F26 with errors such as:

• openshift test failure.
• Jenkins exceptions.
• missing git command.

Example affected PRs:

• metrics: Add remote networking bandwidth test. tests#807
• ci: pull kernel from github release tests#816
• Allow to change internetworking model runtime#887
• docs: limitations: document 'unhandled rdmsr' dmesg warnings runtime#884
• Add support to BC-Linux system runtime#863

[chavafg]

After digging into the Fedora failures, cc-runtime list seems to be the problem: clearcontainers/runtime#902

git is installed after the VM is launched.
Still need to take a look at the jenkins exceptions.

[chavafg]

A quick 'nasty' fix for the CI would be to comment this line:
https://github.com/clearcontainers/tests/blob/master/integration/openshift/hello_world.bats#L47

And uncomment it once clearcontainers/runtime#902 is fixed.

[chavafg]

So this is was fixed with clearcontainers/tests#833. Closing issue... Still clearcontainers/runtime#902 need to be investigated furtherly