Add example of setting a pipeline with a vars file

Signed-off-by: Taylor Silva <tsilva@pivotal.io>

pipelines/set-pipelines.yml

@@ -35,6 +35,10 @@ jobs:
       first: initial
       number: "9000"
       hello: HAL
+  - set_pipeline: pipeline-vars-file
+    file: concourse-examples/pipelines/pipeline-vars.yml
+    var_files:
+      - concourse-examples/pipelines/vars-file.yml
   - set_pipeline: instance-groups
     file: concourse-examples/pipelines/pipeline-vars.yml
     # instance_vars is currently experimental and requires the feature flag

pipelines/vars-file.yml

@@ -0,0 +1,3 @@
+first: initial
+number: "9000"
+hello: HAL