KH-177 Preserve old relations

When creating new version of koodi. Added new column versio to
KoodinSuhde to keep track of these.
KH-177: Removed option to delete old koodinsuhde

When new version of koodi is created.
OVT-7496 skip codes filtering for OPH user

Provided he has modifying rights.
Merge branch 'develop'
Merge branch 'master' into prod