config+pathfind_test+notifications_test: format and fix newVertex import

Run go fmt so config file is formatted correctly. Also rename
newVertex to NewVertex in pathfind_test and notifications_test
as it is now exported from the routing package.

config.go

@@ -131,7 +131,6 @@ type config struct {
 
 	NoNetBootstrap bool `long:"nobootstrap" description:"If true, then automatic network bootstrapping will not be attempted."`
 
-
 	NoEncryptWallet bool `long:"noencryptwallet" description:"If set, wallet will be encrypted using the default passphrase."`
 
 	TrickleDelay int `long:"trickledelay" description:"Time in milliseconds between each release of announcements to the network"`