More minor fixes to code formatting in network package

network/gateway/hostPool.go

network/gateway/hostpool_test.go

network/gateway/sender.go

network/gateway/sender_test.go

network/gateway/storeHostList.go

network/gateway/storeHostList_test.go

network/gateway/utils_test.go

network/health/tracker.go

network/health/tracker_test.go

network/historical/historical.go

network/historical/historical_test.go

network/historical/params.go

network/identity/tracker.go

network/manager.go

network/message/inProgress_test.go

network/nodes/mixCypher.go

network/nodes/mixCypher_test.go

network/nodes/register.go

network/nodes/registrar.go

network/nodes/store.go