Merge "Add main e2e upgrade test job"

diff --cc jjb/metal3/projects.yml
index 1da90351fcb3e76c960da302ccb82bbfc3446b84,5989f00d49b9766b4ee6d7cb1c1b4b9321a13f51..dba00df5b22b7cfef13cbfd6968e6a48405fab8d
--- 1/jjb/metal3/projects.yml
--- 2/jjb/metal3/projects.yml
+++ b/jjb/metal3/projects.yml
@@@ -237,8 -243,12 +237,11 @@@
                  capi_version: v1alpha4
                  capm3_version: v1alpha5
                  target_branches:
 -                  - 'master'
                    - 'main'
                    - 'release-0.5'
+       - capm3_main_e2e_upgrade_tests:
+           exclude:
+             - image_os: centos
        - capm3_main_e2e_tests:
            version:
              - v1b1: