Upgrade to swagger-codegen 2.3.1

Also fix a regex-o in .travis.yml. + needed to be escaped.

.travis.yml

@@ -11,11 +11,13 @@ cache:
   - ${TRAVIS_BUILD_DIR}/examples/browser/node_modules
 before_install:
 - ./.travis/install-protoc.sh 3.1.0
-- ./.travis/install-swagger-codegen.sh 2.2.2
+- ./.travis/install-swagger-codegen.sh 2.3.1
 - nvm install v6.1 && nvm use v6.1 && node --version
 - go get github.com/golang/lint/golint
 - go get github.com/dghubble/sling
 - go get github.com/go-resty/resty
+- go get golang.org/x/oauth2
+- go get golang.org/x/net/context
 install:
 - go get github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway
 - go get github.com/grpc-ecosystem/grpc-gateway/runtime
@@ -35,7 +37,7 @@ after_success:
 env:
   global:
   - "PATH=$PATH:$HOME/local/bin"
-  - GO_VERSION_TO_DIFF_TEST="go version go1\.9\.[0-9]+ linux/amd64"
+  - GO_VERSION_TO_DIFF_TEST="go version go1\.9\.[0-9]\+ linux/amd64"
   matrix:
   - GATEWAY_PLUGIN_FLAGS=
   - GATEWAY_PLUGIN_FLAGS=request_context=false

examples/clients/abe/.swagger-codegen/VERSION

@@ -0,0 +1 @@
+2.3.1

examples/clients/abe/a_bit_of_everything_nested.go

@@ -1,11 +1,11 @@
-/* 
+/*
  * A Bit of Everything
  *
  * No description provided (generated by Swagger Codegen https://github.com/swagger-api/swagger-codegen)
  *
- * OpenAPI spec version: 1.0
+ * API version: 1.0
  * Contact: none@example.com
- * Generated by: https://github.com/swagger-api/swagger-codegen.git
+ * Generated by: Swagger Codegen (https://github.com/swagger-api/swagger-codegen.git)
  */
 
 package abe
@@ -18,5 +18,5 @@ type ABitOfEverythingNested struct {
 
 	Amount int64 `json:"amount,omitempty"`
 
-	Ok NestedDeepEnum `json:"ok,omitempty"`
+	Ok *NestedDeepEnum `json:"ok,omitempty"`
 }