Readded the tests for DiagonalOperator

5 jobs for master in 11 minutes and 26 seconds
Status Name Job ID Coverage
  Test
passed test_min #190580

00:02:09

passed test_mpi #190581

00:03:43

passed test_mpi_fftw #190582

00:04:12

passed test_mpi_fftw_hdf5 #190583

00:05:21

57.0%
 
  Release
passed release_image_master #190584

00:06:04