Certificates are recreated if they share the same common name

[nsimons]

To reproduce, execute certyaml twice with the below config:

subject: cn=root
ca: true
---
subject: cn=server
issuer: cn=root
---
subject: cn=server
issuer: cn=root
filename: server-refreshed

Output will be:

→  certyaml -d certs
Loading manifest file: certs.yaml
Reading certificate state file: certs/certs.state
Writing: certs/root.pem certs/root-key.pem
Writing: certs/server.pem certs/server-key.pem
Writing: certs/server-refreshed.pem certs/server-refreshed-key.pem
Writing state: certs/certs.state
→  certyaml -d certs
Loading manifest file: certs.yaml
Reading certificate state file: certs/certs.state
No changes: skipping root
Writing: certs/server.pem certs/server-key.pem
Writing: certs/server-refreshed.pem certs/server-refreshed-key.pem
Writing state: certs/certs.state

Expected:

→  certyaml -d certs
Loading manifest file: certs.yaml
Reading certificate state file: certs/certs.state
Writing: certs/root.pem certs/root-key.pem
Writing: certs/server.pem certs/server-key.pem
Writing: certs/server-refreshed.pem certs/server-refreshed-key.pem
Writing state: certs/certs.state
→  ./certyaml -d certs
Loading manifest file: certs.yaml
Reading certificate state file: certs/certs.state
No changes: skipping root
No changes: skipping server
No changes: skipping server-refreshed
Writing state: certs/certs.state