Change graph gen params to default to previous values

cmd/conf/graphgen_test.go

 package conf
 
+import "runtime"
+
 var ExpectedGraphGen = GraphGen{
 	minInputSize:    4,
-	defaultNumTh:    2,
+	defaultNumTh:    uint8(runtime.NumCPU()),
 	outputSize:      4,
 	outputThreshold: 0.0,
 }
\ No newline at end of file

cmd/conf/params.go

@@ -22,6 +22,7 @@ import (
 	"gitlab.com/elixxir/server/services"
 	"golang.org/x/crypto/blake2b"
 	"net"
+	"runtime"
 )
 
 // This object is used by the server instance.
@@ -72,8 +73,18 @@ func NewParams(vip *viper.Viper) (*Params, error) {
 	params.Permissioning.RegistrationCode = vip.GetString("permissioning.registrationCode")
 
 	params.GraphGen.defaultNumTh = uint8(vip.GetUint("graphgen.defaultNumTh"))
+	if params.GraphGen.defaultNumTh == 0 {
+		params.GraphGen.defaultNumTh = uint8(runtime.NumCPU())
+	}
 	params.GraphGen.minInputSize = vip.GetUint32("graphgen.mininputsize")
+	if params.GraphGen.minInputSize == 0 {
+		params.GraphGen.minInputSize = 4
+	}
 	params.GraphGen.outputSize = vip.GetUint32("graphgen.outputsize")
+	if params.GraphGen.outputSize == 0 {
+		params.GraphGen.outputSize = 4
+	}
+	// This (outputThreshold) already defaulted to 0.0
 	params.GraphGen.outputThreshold = float32(vip.GetFloat64("graphgen.outputthreshold"))
 
 	params.Batch = vip.GetUint32("batch")

cmd/conf/params.yaml

@@ -50,9 +50,4 @@ skipReg: true
 keepBuffers: true
 metrics:
   log:  "~/.elixxir/metrics.log"
-graphgen:
-  defaultNumTh: 2
-  mininputsize: 4
-  outputsize: 4
-  outputthreshold: 0.0
 ...

cmd/node.go

@@ -149,14 +149,6 @@ func StartServer(vip *viper.Viper) {
 			round, payload, "FULL/BATCH")
 	}
 
-	//PanicHandler := func(g, m string, err error) {
-	//	jww.FATAL.Panicf(fmt.Sprintf("Error in module %s of graph %s: %+v", g,
-	//		m, err))
-	//}
-
-	//def.GraphGenerator = services.NewGraphGenerator(4, PanicHandler,
-	//	uint8(runtime.NumCPU()), 4, 0.0)
-
 	def.RngStreamGen = fastRNG.NewStreamGenerator(params.RngScalingFactor,
 		uint(runtime.NumCPU()), csprng.NewSystemRNG)