Added a test of the dpd conservative force calculation
Added a test of the dpd conservative force calculation

git-svn-id: 3ea6b065ef5c42523d6f373bf8239334b3a6a1a5@3422 fa922fa7-2fde-0310-acd8-f43f465a7996

joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue