Removed 'dead' data at the end of test data.
Added test for SHUT well
WellsManager: do not require a control mode to be set if the well status is SHUT

For Norne it fell on its nose because of this...
Merge pull request #664 from joakim-hove/well-shut-test

Well shut test
Merge remote-tracking branch 'upstream/master' into timestepcontrol