062a29e luci: Add support for the fence_apc cmd_prompt attr

Authored and Committed by rmccabe 9 years ago
    luci: Add support for the fence_apc cmd_prompt attr
    
    Add support for setting/viewing the newly-added "cmd_prompt"
    attribute for fence_apc fence devices.
    
    Resolves: rhbz#1010400
    
    Signed-off-by: Ryan McCabe <rmccabe@redhat.com>