metal3: Add e2e integration job for release-1.4

Change-Id: Ia83b7928a455764a3c8f84153ede997d50e64fc5
diff --git a/jjb/metal3/projects.yml b/jjb/metal3/projects.yml
index c13afb5..f642d55 100644
--- a/jjb/metal3/projects.yml
+++ b/jjb/metal3/projects.yml
@@ -323,6 +323,13 @@
                 target_branches:
                   - 'main'
                   - 'release-1.5'
+            - release-1-4:
+                capi_version: v1beta1
+                capm3_version: v1beta1
+                capm3_release_branch: release-1.4
+                target_branches:
+                  - 'main'
+                  - 'release-1.4'
       - capm3_e2e_basic_tests:
           capm3_target_branch:
             - main: