export path in shippable and travis

.travis.yml

@@ -11,6 +11,7 @@ install:
   - go get golang.org/x/tools/cmd/goimports
   - ./hack/travis/install-etcd.sh
   - ./hack/build-go.sh
+  - export PATH=$GOPATH/bin:./third_party/etcd:$PATH
 
 script:
   - ./hack/verify-gofmt.sh
@@ -19,7 +20,7 @@ script:
   - ./hack/verify-generated-conversions.sh
   - ./hack/verify-generated-deep-copies.sh
   - ./hack/verify-generated-docs.sh
-  - PATH=./third_party/etcd:$PATH ./hack/verify-swagger-spec.sh
+  - ./hack/verify-swagger-spec.sh
   - ./hack/verify-linkcheck.sh
 
 notifications: