fix test engine to use synchronouse ugrid.context()
fix test engine to use synchronouse ugrid.context()


Former-commit-id: 4039186818cc36e41053b05ffe287ee03458090d
mvertes/skale-engine,skale-me/skale-engine,skale-me/skale-engine,mvertes/skale-engine,mvertes/skale-engine,skale-me/skale-engine