Moved sleep in Nailgun agent
Moved sleep in Nailgun agent

Node should not wait after checking '/var/run/nodiscover' file
when reboot is started, it should give Astute time to react
(and to create this file) and only then check it and reboot.

Change-Id: I2c6464262e100244bc525f8e8b456eb26d35e3a1
Related-Bug: #1371225

warpc/fuel-nailgun-agent