Updated CCCL schema for snat config.
Updated CCCL schema for snat config.

Problem:
 Current schema does not allow for source address translation of none to
 be configured on virtual servers. Also some of the documentation does
 not match the schema definitions.

Solution:
 Allow for none type source address translation to be configured and
 correct documentation.

ryan-talley/f5-cccl,ryan-talley/f5-cccl,f5devcentral/f5-cccl,f5devcentral/f5-cccl