fix an import command unit test on Windows
fix an import command unit test on Windows

Fix on Windows the "ImportCommand: should fail if repo has uncommitted changes" unit test

lerna/lerna,dmfenton/lerna,lerna/lerna,lerna/lerna,tbayaa/lerna,evocateur/lerna,treshugart/lerna,kittens/lerna,asini/asini,evocateur/lerna,sebmck/lerna,FaHeymann/lerna,doug-wade/lerna,onigoetz/lerna-hg