Fix the Root CA in HCP namespace to have the same naming convention as Certmanager

When we create an HCP, the Root CA in the HCP namespaces has the certificate and key named as

• ca.key
• ca.crt
  But to cert manager expects them to be named as
• tls.key
• tls.cert

Done criteria: The Root CA should have the certificate and key named as the cert manager expects.