*: use Go 1.10.3 for testing

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

.travis.yml

@@ -6,7 +6,7 @@ sudo: required
 services: docker
 
 go:
-- 1.9.7
+- 1.10.3
 
 notifications:
   on_success: never
@@ -23,7 +23,7 @@ env:
 matrix:
   fast_finish: true
   allow_failures:
-  - go: 1.9.7
+  - go: 1.10.3
     env: TARGET=linux-386-unit
   exclude:
   - go: tip

Makefile

@@ -66,16 +66,13 @@ endif
 
 # Example:
 #   GO_VERSION=1.8.7 make build-docker-test
-#   GO_VERSION=1.9.7 make build-docker-test
 #   make build-docker-test
 #
 #   gcloud docker -- login -u _json_key -p "$(cat /etc/gcp-key-etcd-development.json)" https://gcr.io
 #   GO_VERSION=1.8.7 make push-docker-test
-#   GO_VERSION=1.9.7 make push-docker-test
 #   make push-docker-test
 #
 #   gsutil -m acl ch -u allUsers:R -r gs://artifacts.etcd-development.appspot.com
-#   GO_VERSION=1.9.7 make pull-docker-test
 #   make pull-docker-test
 
 build-docker-test: