* Rework certificate authentication api
- Use the passed in Vault api client to perform the connection
- This provides namespace support, retry behaviors and uses
the existing secret parsing logic instead of re-implementing it
- Change the cert auth role to be an optional argument
- Allow users to use a different cert auth mount point
* Clean up test name
Co-authored-by: Amir Aslamov <amir.aslamov@hashicorp.com>
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Co-authored-by: Amir Aslamov <amir.aslamov@hashicorp.com>
