ZODB Components: erp5_banking_core: Fix...

ZODB Components: erp5_banking_core: Fix testERP5Banking{AccountingCancellation,BankAccountInventory,CheckDeposit} failures.

BankingOperation monkey patches several ERP5 basic classes to add getBaobab* methods.
With ERP5Banking Product on FS, BankingOperation was imported at Zope startup when
loading Products and monkey patches were applied.