Fixed rpm: Missing vendor value

installers/linux/rpm/kvm2_rpm_template/docker-machine-driver-kvm2.spec

@@ -4,6 +4,7 @@ Release: 0
 Summary: Machine driver for KVM
 License: ASL 2.0
 Group: Development/Tools
+Vendor: The Kubernetes Authors
 URL: https://github.com/kubernetes/minikube
 #Requires: <determined automatically by rpm>
 

installers/linux/rpm/minikube_rpm_template/minikube.spec

@@ -6,6 +6,7 @@ Release: --REVISION--
 Summary: Run Kubernetes locally
 License: ASL 2.0
 Group: Development/Tools
+Vendor: The Kubernetes Authors
 URL: https://github.com/kubernetes/minikube
 
 # Needed for older versions of RPM