improve Dock to be ready for upstream

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
fix GROMACS-4.5.5-goalf-1.1.0-no-OFED.eb

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
GROMACS-4.5.5-goalf-1.1.0 serial & parallel versions

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
add easyconfigs for PRACE compatibility

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>