Allow also concurrent neighborhood gossip jobs when seeding data
into the network.
Update Grafana dashboard for two additional metrics regarding
lookups in neighborhood gossip.
* Add concurrency to the content offers of neighborhoodGossip proc
And remove some whitespace
* Remove more whitespace and adjust for 80 char line limit
* Update fluffy grafana dashboard to include gossip offer results
Kim De Mey
KonradStaniec