ERT-693: Have changed load_active to first check if file exists.
ERT-693: Added size of GEN_DATA in the GEN_DATA load log.
ERT-693: Added verbose warning when using DATE or DAYS for GEN_OBS
Merge pull request #543 from joakim-hove/ERT-693-GEN_DATA_BUG

Ert 693 gen data bug