add tag to images in manifest

9 jobs for master in 35 seconds (queued for 1 second)
Name Stage Failure
build-proc2 Build
      * The resulting image will be pushed to image stream tag "proc2:latest"
* A binary build was created, use 'oc start-build --from-dir' to trigger a new build

--> Creating resources with label build=proc2 ...
error: "python:3.7" already exists "proc2" created "proc2" created
--> Failed
ERROR: Job failed: exit code 1