Offline Detection Restart is missing the uptime info

[patrickjaigner]

Every time the system restarts after detection of being offline for >24 hours, it keeps restarting until a new connection is present. This poses a danger to the OS and might be the reason of the broken pipe issue #184

Fix:

• Add uptime -s for time since boot

[patrickjaigner]

From terminal integration test

from datetime import datetime
import subprocess
import time

uptime = subprocess.check_output("uptime -s", shell=True)
uptime = uptime.decode("utf-8").strip()
uptime = datetime.strptime(uptime, "%Y-%m-%d %H:%M:%S")
uptime = time.time() - uptime.timestamp()

print(uptime)

[patrickjaigner]

Tested and integrated with 0.3.0-beta.2