Fix default namespace and helm-release name templates and default environment
Fix default namespace and helm-release name templates and default environment

 - use explicitly set environment from werf.yaml if present;
 - when --env not set then use `[[ project ]]` template by default for both namespace and release;
 - when --env is set then use `[[ project ]]-[[ env ]]` template by default for both namespace and release.

flant/dapp,flant/dapp,flant/dapp