Orient connection fails after pause

[underlow]

Orient connection fails after several seconds of pause:

{"timestamp":1521107611800,"status":500,"error":"Internal Server Error",
"exception":"com.orientechnologies.orient.enterprise.channel.binary.OTokenSecurityException",
"message":"The token provided is expired","path":"/api/access/signIn"}

With orient defaults reproducible with several hours pause but with:

<entry value="120" name="network.http.sessionExpireTimeout"/>
<entry value="3" name="network.token.expireTimeout"/> 

can be reproduced within minutes

[underlow]

@sreznick Heartbeat implemented.

Orient confirms that problem is on their side. Make sense check in future Orient releases