tidy up easy-rsa roles

Hi Guys,
this is a big pull request, that involes a lot of deletes. Please look at it carefully, and know that there were task lists that were never called (now removed) and some redundancy has been moved from the three roles easy-rsa-CA easy-rsa-CA-server and easy-rsa-CA-client to a dependent role easy-rsa.

tidy up easy-rsa CA server and client to depend on easy-rsa. Use sudo where appropriate.

Rename easy-rsa-CA-server to easy-rsa-server and easy-rsa-CA-client to easy-rsa-client since these roles have nothign to do with the CA