Import Loans from spreadsheet template

[chrisjsimpson]

For demos, banks and fin-techs often provide spreadsheets of example data they want to show for an app demo or online banking with a small dataset. This includes bank accounts.

Scenario: Import Loans from spreadsheet
Ability to import Loans based on a standard template.

We already provide this facility for importing branches and accounts , so long as the user provides a valid Loans template, we can import them via obp cli.

• Blocked by #40

[chrisjsimpson]

• Create product for each loan #40
• Attach product attributes to product
• Attach account attributes to account

[chrisjsimpson]

• Loans are just products with attributes.. so we need a product template not a loans template, probably.

• Create Product: https://apiexplorersandbox.openbankproject.com/#OBPv3_1_0-createProduct

• Create Product attribute: https://apiexplorersandbox.openbankproject.com/#OBPv3_1_0-createProductAttribute