Merge pull request #18 from cstavr/feature-dispatcher-check

Tool for checking status of Cyclades update path.

This patch series implements a tool for checking the status of Cyclades update path, which
includes Ganeti, AMQP, snf-ganeti-eventd and snf-dispatcher. The tool is
created as part of the snf-dispatcher and can be used by passing the
'--status-check' option. Also, snf-ganeti-eventd is extended in order to send
heartbeat messages.
cyclades: Unify arguments in management commands

Unify the string listing that is used to describe the arguments that are
accepted by snf-manage commands, and is displayed in the 'usage' of the
commands' help message. Also, add the argument in some commands that it
was missing.