Updated reference with fixed potential-shift dispcorr

New reference energy files (single and double) that use the
proper potential-shift dispersion correction. It also fixes
a typo in the reference grompp output.

Refs. #1463.

Change-Id: If422a4326faede476ccb32be5a9da332e92f2b71
Get information about grompp warnings from Jenkins

Change-Id: Ide29deb8f14502c6556d11a827c7bd481c5faf59
New reference values for corrected shift dispersion correction.

The classical 'shift' in Gromacs corresponds to the force-switch
modifier introduced in Gromacs-5.0. Now all three modifiers
(potential-shift, potential-switch, and force-switch) produce
virtually identical total LJ energies.

Change-Id: I400784cf792428fe811560cbdbd7e86d3c887156
Merge release-4-6 into release-5-0

All reference values are kept from previous. The reference
values were already updated indpdendently for the disp-corr
changes.

Conflicts:
	complex/nbnxn_pme/reference_d.edr
	complex/nbnxn_pme/reference_s.edr
	complex/nbnxn_rf/reference_d.edr
	complex/nbnxn_rf/reference_s.edr
	freeenergy/coulandvdwsequential_coul/reference_d.edr
	freeenergy/coulandvdwsequential_coul/reference_d.log
	freeenergy/coulandvdwsequential_coul/reference_s.edr
	freeenergy/coulandvdwsequential_coul/reference_s.log
	freeenergy/coulandvdwsequential_vdw/reference_d.edr
	freeenergy/coulandvdwsequential_vdw/reference_d.log
	freeenergy/coulandvdwsequential_vdw/reference_s.edr
	freeenergy/coulandvdwsequential_vdw/reference_s.log
	freeenergy/coulandvdwtogether/reference_d.edr
	freeenergy/coulandvdwtogether/reference_d.log
	freeenergy/coulandvdwtogether/reference_s.edr
	freeenergy/coulandvdwtogether/reference_s.log
	gmxtest.pl
	kernel/nb_kernel_ElecEwSw_VdwBhamSw_GeomW4P1/reference_d.warn
	kernel/nb_kernel_ElecEwSw_VdwBhamSw_GeomW4P1/reference_s.warn

Change-Id: Ia4ff6006471146ab678550bc0abb1602e51b17d0