Specify working directory for CTest tests.
Specify working directory for CTest tests.

This is needed here because these validations tests must be able to find reference data files which are located in the chrono-T data/ directory.  The path to this directory is relative to the directory where the executables are generated.

rserban/chrono,dariomangoni/chrono,tjolsen/chrono,dariomangoni/chrono,andrewseidl/chrono,projectchrono/chrono,Bryan-Peterson/chrono,amelmquist/chrono,dariomangoni/chrono,amelmquist/chrono,armanpazouki/chrono,amelmquist/chrono,armanpazouki/chrono,rserban/chrono,projectchrono/chrono,rserban/chrono,tjolsen/chrono,Milad-Rakhsha/chrono,Bryan-Peterson/chrono,amelmquist/chrono,jcmadsen/chrono,jcmadsen/chrono,projectchrono/chrono,andrewseidl/chrono,projectchrono/chrono,jcmadsen/chrono,rserban/chrono,jcmadsen/chrono,amelmquist/chrono,dariomangoni/chrono,andrewseidl/chrono,Milad-Rakhsha/chrono,rserban/chrono,rserban/chrono,tjolsen/chrono,Bryan-Peterson/chrono,jcmadsen/chrono,andrewseidl/chrono,andrewseidl/chrono,armanpazouki/chrono,rserban/chrono,armanpazouki/chrono,tjolsen/chrono,jcmadsen/chrono,dariomangoni/chrono,Bryan-Peterson/chrono,projectchrono/chrono,tjolsen/chrono,armanpazouki/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,dariomangoni/chrono,armanpazouki/chrono,amelmquist/chrono,Bryan-Peterson/chrono,jcmadsen/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono