Addresses Issue 8

[stratus-ss]

What does this PR do?

• added check for rhel-7-fast-datapath-rpms repo in OCP 3.5

How can it be tested?

No usage change. The script is still launched as before, it just adds an additional repo to check for

[stratus-ss]

@etsauer this should close https://github.com/redhat-cop/openshift-toolkit/issues/8