[hdf5scan] fix scan path when loaded from dictionnary

3 jobs for more_fix_hdf5_creation in 2 minutes and 5 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test Library
passed #126978
test:python3.5-stretch-pyqt5

00:01:13

passed #126979
test:python3.7_stretch_pyqt5

00:01:10

 
  Test Notbooks
passed #126980
test:test-tomoscan-tutorials

00:00:51