Make Environment less God-objecty

The following discussion from nnolte/protoconf!11 should be addressed:

• @rmatev started a discussion: (+1 comment)

  Environment is a bit of a God object. The high-level application configuration is a different task but here we can at least separate the CF out of it

mentioned in merge request !233 (merged)

closed via commit 156e3446

mentioned in commit 156e3446

mentioned in commit LHCb@6c9511b2