HO04 New Extension

-Added: persist() customer to .em in HO
- NOTE1: Delete @GeneratedValue for customer also in HO, otherwise no
persist() possible
- Note2: convertToCustomerFromJava() is important to set the new id in
the HO
- ToDo: adapt prescrptionBill if same Name,email of customer, testing!!,
try to update customer list in HO if something changes in java or c#
pharmacy