Add Organization Details to samlp.metadata

[vineetdpnd]

Describe the problem you'd like to have solved

As a Identity Provider I would like to add the details of my Organization to the IDP XML

• Organization Name
• Organization Contact Name
• Organization Support Email
• Organization Privacy Policy URL

Describe the ideal solution

samlp.metadata should allow to add other metadata to the IDP XML apart from the default ones

• If it is already existing (which from the code of the module, I couldn't find any solutions) then I am sorry for raising the request and would request to add examples for the same