Fixing issues with static check (#286)

```
cmd/policy-server-asg-syncer/main.go:72:3: printf-style function with dynamic format string and no further arguments should use print-style function instead (SA1006)
cmd/policy-server-internal/main.go:71:3: printf-style function with dynamic format string and no further arguments should use print-style function instead (SA1006)
cmd/policy-server/main.go:120:3: printf-style function with dynamic format string and no further arguments should use print-style function instead (SA1006)
```

Author: Marc Paquette

src/code.cloudfoundry.org/policy-server/cmd/policy-server-asg-syncer/main.go

@@ -69,7 +69,7 @@ func main() {
 		logger,
 	)
 	if err != nil {
-		log.Fatalf(err.Error())
+		log.Fatal(err.Error())
 	}
 
 	securityGroupsStore := &store.SGStore{

src/code.cloudfoundry.org/policy-server/cmd/policy-server-internal/main.go

@@ -68,7 +68,7 @@ func main() {
 		logger,
 	)
 	if err != nil {
-		log.Fatalf(err.Error())
+		log.Fatal(err.Error())
 	}
 
 	dataStore := store.New(

src/code.cloudfoundry.org/policy-server/cmd/policy-server/main.go

@@ -117,7 +117,7 @@ func main() {
 		logger,
 	)
 	if err != nil {
-		log.Fatalf(err.Error())
+		log.Fatal(err.Error())
 	}
 
 	logger.Info("db connection retrieved", lager.Data{})