Analyze old data models

Old database Schema was analyzed and some tables were splited into two new entities due to normalization issues and to avoid data duplication.

Some tables were migrated to OpenObject native models and extended with aditional information to support all the data on the old database

Cliente --> res.partner
Viatico --> hr.expense
Empleado --> res.users
Preventivo --> project.project

Extended models without equivalent on old database:

sale.order
account.invoice

And all the fields about Zones or Location were added to the model:

res.partner.address

The following new models were created

policy.equipment.type: to store the distinct equipment types
policy.equipment.service.type: to store the distinct types of services that an A/C Equipment can provide
policy.equipment: to store all the equipment directly related data
project.project.type: to store the distinct types of preventive maintenance projects that the company provides
policy.contract.coverage: to store de distinct coverages that the policy covers
tech.team: to store data about the teams of technicians that provides the support and maintenance services
tech.team.contract: to store thata about the tech teams contracts
policy.payment.type: to store the distinct allowed payment types
policy.contract: to store information about the contracts with clients (policies)
policy.vehicle: stores data about the vehicles that the company owns