fix(olm): No longer report status if minKubeVersion not specified
fix(olm): No longer report status if minKubeVersion not specified

Currently, OLM will report requirementStatus for `minKubeVersion`
even if it is not specified. The status becomes confusing as
`minKubeVersion` is not required. After this change, the status
is no longer reported if `minKubeVersion` is not specified.

Signed-off-by: Vu Dinh <5bfaa3ed2f38327c8cc251d9e534a7bfb62c1ebe@redhat.com>

operator-framework/operator-lifecycle-manager,operator-framework/operator-lifecycle-manager