add DNSName to SAN for go1.15 CN deprecation (#811)
add DNSName to SAN for go1.15 CN deprecation (#811)

Signed-off-by: rbtr <506605953f632c098bad3093b43c49af30f8488e@users.noreply.github.com>
open-policy-agent/gatekeeper,open-policy-agent/gatekeeper,open-policy-agent/gatekeeper,open-policy-agent/gatekeeper,open-policy-agent/gatekeeper