use-dks option

On opalrunner, I load the opal-toolschain/1.6 and OPAL/1.5.1-20170217

> Currently Loaded Modulefiles:
>   1) gcc/5.4.0               4) hdf5/1.8.18           7) trilinos/12.10.1     10) OpenBLAS/0.2.19      13) opal-toolschain/1.6
>   2) openmpi/1.10.4     5) H5hut/2.0.0rc3      8) root/6.08.02         11) cuda/8.0.44              14) OPAL/1.5.1-20170217
>   3) boost/1.62.0          6) gsl/2.2.1                9) cmake/3.6.3         12) dks/1.0.1

then run opal with the --use-dks option: opal --use-dks Input.in

It seems that the GPU card is not detected (not sure if the IPPL message is correct).

Ippl> No GPU device detected! --use-dks flag will have no effect
>                ____  _____       ___ 
>               / __ \|  __ \ /\   | | 
>              | |  | | |__) /  \  | |
>              | |  | |  ___/ /\ \ | |
>              | |__| | |  / ____ \| |____
>               \____/|_| /_/    \_\______|
OPAL> 
OPAL> This is OPAL (Object Oriented Parallel Accelerator Library) Version 1.5.1
OPAL> 
OPAL>                 (c) PSI, http://amas.web.psi.ch
OPAL> 
OPAL> OPAL compiled with DKS (Dynamic Kernel Scheduler) Version 1.0.0