Add more instructions on the ssh keys that need to be copied for clone

[sthirugn]

in satellite-clone.md there is a note:

If you are using Remote Execution, you will have to re-copy the ssh keys to your clients. The keys are regenerate during the install portion of the clone process.

Add more instructions to from which folder the ssh keys need to be copied.

[johnpmitsch]

we should probably say something like "refer to the remote execution documentation for directions on copyin the keys"