Update dependencies

Among others, this updates minio-go, so that the new "eu-west-3" zone
for AWS is supported.

vendor/google.golang.org/api/deploymentmanager/v2/deploymentmanager-api.json

@@ -1,12 +1,12 @@
 {
  "kind": "discovery#restDescription",
- "etag": "\"YWOzh2SDasdU84ArJnpYek-OMdg/4coXG-kLdOLe0xqn_lc-mbxcObg\"",
+ "etag": "\"YWOzh2SDasdU84ArJnpYek-OMdg/GDaMgEo2rpzvf2TXCj_2gpZ3fIE\"",
  "discoveryVersion": "v1",
  "id": "deploymentmanager:v2",
  "name": "deploymentmanager",
  "canonicalName": "Deployment Manager",
  "version": "v2",
- "revision": "20170925",
+ "revision": "20171201",
  "title": "Google Cloud Deployment Manager API",
  "description": "Declares, configures, and deploys complex solutions on Google Cloud Platform.",
  "ownerDomain": "google.com",
@@ -513,7 +513,7 @@
   "Operation": {
    "id": "Operation",
    "type": "object",
-   "description": "An Operation resource, used to manage asynchronous API requests.",
+   "description": "An Operation resource, used to manage asynchronous API requests. (== resource_for v1.globalOperations ==) (== resource_for beta.globalOperations ==) (== resource_for v1.regionOperations ==) (== resource_for beta.regionOperations ==) (== resource_for v1.zoneOperations ==) (== resource_for beta.zoneOperations ==)",
    "properties": {
     "clientOperationId": {
      "type": "string",