bugfix for md-vv + nose-hoover + (nstcalcenergy > nsttcouple)

Need global communication the step befre nsttcouple
in order to get the kinetic energy right, because
of the offsets velocity verlet from leapfrog.

Fixes redmine #1129

Change-Id: Ia6157db8304cc4fb8cccbda0ac3b949e800efeb5