Remove version for fence-agents

Change-Id: Iaa2c8ff065f6b6beb45b0b839a22b96fcffbf49b
Add package for fencing-agent script

Based on existing nailgun agent package and
its installation scheme

Implements blueprint: fencing-in-nailgun-agent

Change-Id: I6c531ae91790c8385d89594681ee5d20c9671fe4
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>