Add detail to copy module validate argument

This clarifies the validate command argument and makes it clear that if
it is present, it must include the '%s' argument for the path to the
temporary file to validate.
nova compute fix regex in instance name
Merge pull request #4421 from jkleckner/copy-module-validate-doc

Add detail to copy module validate argument
Merge pull request #4422 from bennojoy/nova1

nova compute fix for instance name regex issue
Merge pull request #4423 from localvoid/firewalld-fix_timeout

Fix timeout bug in firewalld module
Add support for Rich Rules in firewalld module