Auto-update dependencies (#559)

Produced via:
  `dep ensure -update knative.dev/test-infra`
/assign @mattmoor

Gopkg.lock

@@ -1152,14 +1152,14 @@
 
 [[projects]]
   branch = "master"
-  digest = "1:68050b4ce26531655bac0f6e109d04eb0a4550ead73e320119ed3c628ced4a0a"
+  digest = "1:39bb1014c454fbf9d8f4eab62a44fcf8d3ade774e2b42015e533e5d9f3fe23d9"
   name = "knative.dev/test-infra"
   packages = [
     "scripts",
     "tools/dep-collector",
   ]
   pruneopts = "UT"
-  revision = "17f2331e80ad0d3e170ea2bae45c3922744f83af"
+  revision = "d65201fadb82dbdc5713f9ba9a1313150c7aa9b5"
 
 [solve-meta]
   analyzer-name = "dep"

vendor/knative.dev/test-infra/scripts/e2e-tests.sh

@@ -310,7 +310,8 @@ function setup_test_cluster() {
   # Set the actual project the test cluster resides in
   # It will be a project assigned by Boskos if test is running on Prow,
   # otherwise will be ${GCP_PROJECT} set up by user.
-  readonly export E2E_PROJECT_ID="$(gcloud config get-value project)"
+  export E2E_PROJECT_ID="$(gcloud config get-value project)"
+  readonly E2E_PROJECT_ID
 
   # Save some metadata about cluster creation for using in prow and testgrid
   save_metadata