switch all local imports to relative, to avoid silent mistakes

4 jobs for relative_imports in 2 minutes and 46 seconds
Status Job ID Name Coverage
  Test
failed #257335
test_minimal

00:00:22

failed #257336
test_mpi

00:01:06

failed #257337
test_mpi_fftw

00:01:32

failed #257338
test_mpi_fftw_hdf5

00:02:46

 
Name Stage Failure
failed
test_mpi_fftw_hdf5 Test There is an unknown failure, please try again
No job log
failed
test_mpi_fftw Test There is an unknown failure, please try again
No job log
failed
test_mpi Test There is an unknown failure, please try again
No job log
failed
test_minimal Test There is an unknown failure, please try again
No job log