Please describe your feature

Add coverage in the runtime status check for the case when only max runtime is specified and for the case when both max and min runtime are specified in the buildspec.
See: https://app.codecov.io/gh/buildtesters/buildtest/blob/devel/buildtest/buildsystem/checks.py

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Is there an existing issue

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