Correct mismatch between loggin methods

[fjandrad]

When using the yarpmanager app inertial sensor from the head or xsense is logged.
When using the fork of sensor calib inertial the inertial is not included.
In general this is not an issue, but when launching the calibration for multiple data sets if grid datasets are mixed in the general extra sample with the yoga datasets it creates an error due to mismatch in the structures

[fjandrad]

Current workaround is to put the grid dataset as another tz dataset