Updating module, deletes product template account_category field value

The register method always renames the account_category field:

if table.column_exist('account_category'):
table.column_rename('account_category', 'accounts_category')

...and then creates a new account_category field with empty values.

It should only rename when type of the field is boolean

added accounting + 1 deleted label

Here is review21111002 to fix it.

assigned to @pokoli

added type::behavior + 1 deleted label and removed 1 deleted label

New review21111002 at https://codereview.tryton.org/21111002/#ps1

New changeset ae062a5ef6f3 by Sergi Almacellas Abellana in branch 'default':
Make account_category migration idempotent
http://hg.tryton.org/modules/account_product/rev/ae062a5ef6f3

added 1 deleted label and removed 1 deleted label

closed

New changeset b7c4009b2dec by Sergi Almacellas Abellana in branch '4.0':
Make account_category migration idempotent
http://hg.tryton.org/modules/account_product/rev/b7c4009b2dec