Ability to provision using an existing cert for recovery [SOLARCH-544]

[cyberious]

Use Case

Ability to take an SSL tar.gz directory and import during provision phase for the sake of DR.

Describe the Solution You Would Like

Pass a file or location of a file to download and expand into the ssl directory prior to the installation process to ensure the generated certs for the cluster are from the same CA

Describe Alternatives You've Considered

Outside of the plan do the same above task using something like a parent plan or terraform remote-exec to expand into the directory prior to installation.

Additional Context

Geo located cluster for redundancy without depending on existing cluster. Quick fail over in a true DR scenario.

[abuxton]

@cyberious pe as the ability to backup create --scope config which includes SSL, do you want this as JUST ssl or would enabling backup restore the file as a task/plan be acceptable resolution.

[cyberious]

In my opinion and for my purpose it would need to be at install as all new infrastructure certainly would be clean and signed under that CA, the task would be nice add imho

[bwilcox]

#68

Adds basic checks for hosts which have had CA and cert information restored to them prior to peadm running the provision plan.