Branching for the 3431.x stemcell series.

[#149936513](https://www.pivotaltracker.com/story/show/149936513)

Signed-off-by: Dale Wick <[email protected]>

Author: dpb587-pivotal

ci/configure.sh

@@ -3,6 +3,6 @@
 set -eu
 
 fly -t production set-pipeline \
-  -p bosh:stemcells:3421.x -c ci/pipeline.yml \
-  -l <(lpass show --note "concourse:production pipeline:bosh:stemcells:3421.x") \
+  -p bosh:stemcells:3431.x -c ci/pipeline.yml \
+  -l <(lpass show --note "concourse:production pipeline:bosh:stemcells:3431.x") \
   -l <(lpass show --note "bats-concourse-pool:vsphere secrets")

ci/pipeline.yml

@@ -699,6 +699,7 @@ resources:
   - name: version
     type: semver
     source:
+      initial_version: 3431.10.0
       driver: s3
       key: {{stemcell_version_key}}
       bucket: {{candidate_stemcell_bucket}}