Pin the terraform version to 0.11.14

Authored-by: NTingfang Bao <bbao@pivotal.io>

concourse/pipelines/gpdb_6X_STABLE-generated.yml

@@ -12,7 +12,7 @@
 ## file (example: templates/gpdb-tpl.yml) and regenerate the pipeline
 ## using appropriate tool (example: gen_pipeline.py -t prod).
 ## ----------------------------------------------------------------------
-## Generated by gen_pipeline.py at: 2019-06-03 11:16:38.072531
+## Generated by gen_pipeline.py at: 2019-06-05 12:38:53.179685
 ## Template file: gpdb-tpl.yml
 ## OS Types: ['centos6', 'centos7', 'ubuntu18.04', 'win']
 ## Test Sections: ['ICW', 'Replication', 'ResourceGroups', 'Interconnect', 'CLI', 'UD', 'AA', 'Extensions', 'Gpperfmon']
@@ -202,6 +202,7 @@ resource_types:
   type: docker-image
   source:
     repository: ljfranklin/terraform-resource
+    tag: 0.11.14
 - name: gcs
   type: docker-image
   source:

concourse/pipelines/templates/gpdb-tpl.yml

@@ -284,6 +284,7 @@ resource_types:
   type: docker-image
   source:
     repository: ljfranklin/terraform-resource
+    tag: 0.11.14
 - name: gcs
   type: docker-image
   source: