env.normal should override chart defined variables

3 commits because i wasn't verified and had to redo commits to trigger pipelines, the last two commits cancel each other, only first commit means anything.

this change allows values set in env.normal in values.yaml to override default values in the configmap. in case the postgres database is managed by helm, there can be some inconsistency in host name, that can't be managed by the DATABASE_URL value, as it is ignored for helm managed databases.

Todays behavior also seems like a bug : default values always override manual values, so this merge request is a bug fix i guess