Add support to trigger testnet from a PR (#1434)

* Add support for different node counts

* Update variable names

* Delete network even after failures

* Add array for node counts

* Changed number of nodes to a space separated string of numbers

* Adjust number of nodes

* Snap will not be published if the env variable DO_NOT_PUBLISH_SNAP is set

* Address review comments

* Replaced influx db URL

net/net.sh

@@ -159,7 +159,7 @@ startValidator() {
   declare ipAddress=$1
   declare logFile="$netLogDir/validator-$ipAddress.log"
 
-  echo "--- Starting validator: $leaderIp"
+  echo "--- Starting validator: $ipAddress"
   echo "start log: $logFile"
   (
     set -x