Change ParseCertificateChain test func to use ECDSA keys to speed up runtime
Change ParseCertificateChain test func to use ECDSA keys to speed up
runtime

Signed-off-by: joshvanl <525f14a1257c4e494fcfb5b458ace90de1e9c01d@gmail.com>

jetstack-experimental/cert-manager,cert-manager/cert-manager,jetstack-experimental/cert-manager,jetstack/cert-manager,jetstack-experimental/cert-manager,jetstack/cert-manager,cert-manager/cert-manager,jetstack/cert-manager,cert-manager/cert-manager