Point ORCA pipelines to the gpdb 5X branch

With ORCA going into GPDB, we'll now be using the infrastructure scripts
in the gpdb5 repo instead of the gpdb master repo.

CMakeLists.txt

@@ -6,7 +6,7 @@ project(gpopt LANGUAGES CXX C)
 set(CMAKE_CXX_STANDARD 98)
 set(GPORCA_VERSION_MAJOR 3)
 set(GPORCA_VERSION_MINOR 97)
-set(GPORCA_VERSION_PATCH 0)
+set(GPORCA_VERSION_PATCH 1)
 set(GPORCA_VERSION_STRING "${GPORCA_VERSION_MAJOR}.${GPORCA_VERSION_MINOR}.${GPORCA_VERSION_PATCH}")
 
 # Whenever an ABI-breaking change is made to GPORCA, this should be incremented.

concourse/pipeline.yml

@@ -43,7 +43,7 @@ resources:
 - name: gpdb_src
   type: git
   source:
-    branch: master
+    branch: 5X_STABLE
     uri: https://github.com/greenplum-db/gpdb
     paths:
       - config/orca.m4

concourse/test_explain_pipeline.yml

@@ -50,7 +50,7 @@ resources:
 - name: gpdb_main_src  # used for yml task files
   type: git
   source:
-    branch: master
+    branch: 5X_STABLE
     ignore_paths:
     - README.md
     - LICENSE

concourse/test_orca_pipeline.yml

@@ -47,7 +47,7 @@ resources:
 - name: gpdb_main_src
   type: git
   source:
-    branch: master
+    branch: 5X_STABLE
     ignore_paths:
     - README.md
     - LICENSE