Fix: delete myob id of all leave cats  to avoid of issue which org A balances belong to org B leave cats. The issue happens when multiple EH orgs connect to the same Myob org => those orgs have categories with same Myob ID => finding category just by Myob ID would return cat from another org https://github.com/Thinkei/employment-hero/blob/096241363f2e5e8d153cf89b94dfba8eb7314cd2/app/models/leave_balance.rb\#L69-L73
Fix: delete myob id of all leave cats
 to avoid of issue which org A balances belong to org B leave cats. The issue happens when multiple EH orgs connect to the same Myob org => those orgs have categories with same Myob ID => finding category just by Myob ID would return cat from another org https://github.com/Thinkei/employment-hero/blob/096241363f2e5e8d153cf89b94dfba8eb7314cd2/app/models/leave_balance.rb\#L69-L73

[https://trello.com/c/fgJ5rPLE]

Thinkei/eh-myob,Thinkei/eh-myob