inveniocfg: clarification of warning phrases
inveniocfg: clarification of warning phrases

* Clarifies warning phrases about deprecated inveniocfg CLI options
  so that it is clear to the user that the action is still performed
  and that the user does not have to do anything.

Signed-off-by: Tibor Simko <c7116e45300b163846dc01f3ed02116e3f8ef7a5@cern.ch>

tiborsimko/invenio,tiborsimko/invenio,inveniosoftware/invenio,inveniosoftware/invenio