Corrected nstcalclr/nstfep/nst_repl_ex checks

Corrected nstcalclr/nstfep/nst_repl_ex checks

Several checks with twin-range electrostatics still checked for
multiples of nstlist instead of nstcalclr and nst_repl_ex was not
checked at all.
Free-energy with small nstdhdl triggered frequent, unnecessary
neighbor search. It seems this can't have caused isssues with
free-energy, because nstfep needs to be a multiple of nstcalcenergy
which again needs to be a multiple of nstcalclr (was nstlist).

Change-Id: I20b8e8ab8329a3aaf904ddfa21573aee8d58c0e4