release version to 2.6.8

Signed-off-by: Radek Felcman <[email protected]>

2.6.7-RC1: [2.6] Rollback the fix for bug 411013 (#459)

* Revert "Bug 411013: Entities in persistene context get validated on commit ev… (#270) (#271)"

This reverts commit 95176b96d7f04e6a4585b59fa2943a9cb624060b.

* Revert "[2.6] Bug 411013: Entities in persistence context get validated on commit even when unchanged (#248) (#252)"

This reverts commit 4318a80e71568cd41f7f78217a970d577150328a.

* update copyrights

Signed-off-by: Lukas Jungmann <[email protected]>

2.6.7: [2.6] Rollback the fix for bug 411013 (#459)

* Revert "Bug 411013: Entities in persistene context get validated on commit ev… (#270) (#271)"

This reverts commit 95176b96d7f04e6a4585b59fa2943a9cb624060b.

* Revert "[2.6] Bug 411013: Entities in persistence context get validated on commit even when unchanged (#248) (#252)"

This reverts commit 4318a80e71568cd41f7f78217a970d577150328a.

* update copyrights

Signed-off-by: Lukas Jungmann <[email protected]>