Virt updates to ps changes, correcting ps command attr assignment, expanding virt module

Updated the virt module to account for ps's new use of modules instead of dictionaries.
Also adding the getHyperInfo() method for virt module to return a hyper object with appropriate hypervisor info based on the hypervisor type.

Further, corrected bug in ps that was truncating the command attr to the first whole string in the command string.

Signed-off-by: Jake Hunsaker <jhunsake@redhat.com>
Adding failure catching if dmraid -b was not found

Added a failure print out if the dmraid -b file was not found, instead of bombing out in a stack trace.

Signed-off-by: Jake Hunsaker <jhunsake@redhat.com>