Add capm3_release_branch as an env var

This capm3__release_branch environment variable will be passed to pipeline and to
the dev-env tests below in the hierarchy to determine for which CAPM3
and IPAM branch the test should be running.

Change-Id: I6845050fcc0b0a7f16481dfe84ddb4551bb5fb4a
diff --git a/jjb/metal3/projects.yml b/jjb/metal3/projects.yml
index 0e2dc00..869e60d 100644
--- a/jjb/metal3/projects.yml
+++ b/jjb/metal3/projects.yml
@@ -85,11 +85,13 @@
       - main:
           capi_version: v1beta1
           capm3_version: v1beta1
+          capm3_release_branch: main
           target_branches:
             - 'main'
       - release-0-5:
           capi_version: v1alpha4
           capm3_version: v1alpha5
+          capm3_release_branch: release-0.5
           target_branches:
             - 'main'
             - 'release-0.5'
@@ -126,11 +128,13 @@
       - main:
           capi_version: v1beta1
           capm3_version: v1beta1
+          capm3_release_branch: main
           target_branches:
             - 'main'
       - release-0-5:
           capi_version: v1alpha4
           capm3_version: v1alpha5
+          capm3_release_branch: release-0.5
           target_branches:
             - 'main'
             - 'release-0.5'
@@ -180,10 +184,12 @@
             - main:
                 capi_version: v1beta1
                 capm3_version: v1beta1
+                capm3_release_branch: main
                 schedule: "H 4 * * *"
             - release-0-5:
                 capi_version: v1alpha4
                 capm3_version: v1alpha5
+                capm3_release_branch: release-0.5
                 schedule: "30 4 * * *"
 
 - project:
@@ -232,11 +238,13 @@
       - main:
           capi_version: v1beta1
           capm3_version: v1beta1
+          capm3_release_branch: main
           target_branches:
             - 'main'
       - release-0-5:
           capi_version: v1alpha4
           capm3_version: v1alpha5
+          capm3_release_branch: release-0.5
           target_branches:
             - 'release-0.5'
     jobs:
@@ -274,11 +282,13 @@
                 capi_version: v1beta1
                 capm3_version: v1beta1
                 capm3_branch: main
+                capm3_release_branch: main
                 schedule: "H 20 * * *"
             - release-0-5:
                 capi_version: v1alpha4
                 capm3_version: v1alpha5
                 capm3_branch: release-0.5
+                capm3_release_branch: release-0.5
                 schedule: "H 23 * * *"