Add minKubeVersion validation to templates

[dinhxuanvu]

Require minKubeVersion to be SemVer formated (Major.Minor.Patch).

Signed-off-by: Vu Dinh vdinh@redhat.com

[dinhxuanvu]

@njhale Would you mind taking a look?

[dinhxuanvu]

/test e2e-aws-olm

[dinhxuanvu]

/test e2e-aws-olm

[njhale]

@dinhxuanvu Looks like you're hitting an issue with the new anyOf validation:

Error Trace:	operator_groups_e2e_test.go:566
Error:      	Received unexpected error:
     OperatorGroup.operators.coreos.com "a9kv25" is invalid: []: Invalid value: map[string]interface {}{"metadata":map[string]interface {}{"name":"a9kv25", "namespace":"aqdbpn", "creationTimestamp":"2019-03-06T21:54:10Z", "generation":1, "uid":"5f51b529-405a-11e9-a7cb-0e3b49dab7a4"}, "spec":map[string]interface {}{"selector":map[string]interface {}{}, "serviceAccount":map[string]interface {}{"metadata":map[string]interface {}{"creationTimestamp":interface {}(nil)}}}, "kind":"OperatorGroup", "apiVersion":"operators.coreos.com/v1alpha2"}: validation failure list:
			       must validate at least one schema (anyOf)
			       spec.selector.matchLabels in body is required
Test:       	TestOperatorGroupIntersection

I opened #744 to fix the problem.

[njhale]

Sweet, this looks great!
/lgtm

[njhale]

/approve

[openshift-ci-robot]

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