erp5_corporate_identity: add sample data subobjects and allow restricted traverse to fail on reports

erp5_corporate_identity: add missing files, update compare files, set all dates to arbitrary values in test

Float fields are needed to round amounts.
Also, discard empty form groups.
Also, make "hidden" the first group, so any created field gets hidden by default
(which is what we want for all listbox "editable" fields).
Also, remove overrides which seem unneeded for report appearance:
- "lines" is not used for OD* rendering
- "columns" is already the same as in original field
"editable_columns" is used in odt (and maybe in ods, unclear), but
inconsistently with its intended use... so leave it, sadly.

Fixes bug /#/bug_module/20171211-153B610

/reviewed-on nexedi/erp5!526

Removed code from not implemented and not needed compatibility layer.

/reviewed-on nexedi/erp5!525

/reviewed-on !527