Flatten tool parameters need updating for BODS 0.4

[kd-ods]

Bug description

At the moment, the flattened version of submitted BODS 0.4 data isn't quite right. If you run this file through the tool, you'll see that there is no 'statementId' column on sheets 2 - 5 which would be needed to join the rows with the relevant rows on sheet 1.

Suggested fix

The problem is that the parameters passed to flatten-tool here are those for 0.3 and earlier. For 0.4, I think that id_name and root_id need to be 'statementId' and not 'statementID'.

[radix0000]

This specific problem should now be fixed in: http://bods-cove-addbods04.dokkubodsdev1.ods.mobi

Will close this issue once the inverse problem is also fixed.

[kd-ods]

Yes - let's ultimately test this @radix0000 by round-tripping some data from JSON -> xlsx -> JSON and checking that the checks give the same output along the way.

[radix0000]

Inverse has been added. Interestingly JSON -> xlsx -> JSON creates a load of extra errors even for BODS 0.3 data with the old code. Investigating.

[radix0000]

The obvious issues with this round trip in BODS 0.3 are the booleans (true/false in JSON) end up being strings of the Python boolean names ("True"/"False"), and also keys with a value of an empty list disappear along the way.