CI: Adding ICW with ORCA and CodeGen On to PR pipeline.

Answer files differ due to orca, as its more productive to have ICW running with
ORCA on in PR pipeline for early feedback. Instead of running just ORCA on
better to have then Codegen On as well for one ICW.

[ci skip]

concourse/pipelines/pr_pipeline.yml

@@ -149,6 +149,34 @@ jobs:
           path: gpdb_pr
           status: failure
 
+  - name: icw_gporca_codegen_centos6
+    plan:
+    - aggregate:
+      - get: gpdb_pr
+        passed:
+        - compile_gpdb_centos6
+        - compile_gpdb_custom_config_centos6
+      - get: bin_gpdb
+        resource: bin_gpdb_centos
+        passed: [compile_gpdb_centos6]
+        trigger: true
+      - get: centos-gpdb-dev-6
+    - task: ic_gpdb
+      file: gpdb_pr/concourse/tasks/ic_gpdb.yml
+      image: centos-gpdb-dev-6
+      input_mapping:
+        gpdb_src: gpdb_pr
+      params:
+        MAKE_TEST_COMMAND: PGOPTIONS='-c optimizer=on -c codegen=on' installcheck-world
+        BLDWRAP_POSTGRES_CONF_ADDONS: "fsync=off"
+        TEST_OS: centos
+      timeout: 2h30m
+      on_failure:
+        put: gpdb_pr
+        params:
+          path: gpdb_pr
+          status: failure
+
   - name: MU_check_centos
     plan:
     - aggregate:
@@ -180,6 +208,7 @@ jobs:
       - get: gpdb_pr
         passed:
         - icw_planner_centos6
+        - icw_gporca_codegen_centos6
         - MU_check_centos
         trigger: true
     - put: gpdb_pr