use dep ensure instead of dep ensure -update in install.sh

8 jobs for 36-golang-dep in 15 minutes and 10 seconds (queued for 1 second)
Status Job ID Name Coverage
  Lint
passed #22855095
lint:gofmt

00:01:17

passed #22855096
lint:vet

00:01:17

 
  Test
passed #22855098
test:coverage

00:03:39

60.2%
passed #22855099
test:docker

00:02:44

passed #22855097
test:unit

00:02:35

 
  Integration
passed #22855100
docker
integration:oneShot

00:07:33

passed #22855101
docker
integration:ramp

00:10:13

passed #22855102
docker
integration:repeat

00:06:43