pkg/scaffold: Pin controller-runtime to exactly v0.1.4

When you specify a version without an operator, dep automatically uses
the ^ operator by default. That means it will take the major range.
That broke building of generated operators due to missing dependencies
in controller-runtime latest release.

Author: lilic

pkg/scaffold/gopkgtoml.go

@@ -80,7 +80,7 @@ required = [
 
 [[override]]
   name = "sigs.k8s.io/controller-runtime"
-  version = "v0.1.4"
+  version = "=v0.1.4"
 
 [[constraint]]
   name = "github.com/operator-framework/operator-sdk"