Remove SSH code from 3PAR drivers

Remove SSH code from 3PAR drivers

This patch migrates all of the communication
to the 3PAR array into the client library.
Some of the calls to the array happen over ssh
and others happen over REST.  Now the drivers
don't care.

This allows us to change the external client
library to replace SSH calls to REST calls,
without the need of driver changes.

Change-Id: Ia5e94a349308055381001c373b91c444860115c7