Add Organization and Contact details in the Idp metadata

[anujc4]

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DESCRIPTION

Closes #9. Reference was made to @mayankagwl's comments made in #16. Let me know if I missed/misinterpreted something.

[anujc4]

BTW, This is the output of metadata.go

<?xml version='1.0' encoding='UTF-8'?>
<EntityDescriptor xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:assertion="urn:oasis:names:tc:SAML:2.0:assertion" entityID="https://identity-provider.com/">
    <IDPSSODescriptor WantAuthnRequestsSigned="false" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
        <KeyDescriptor use="signing">
            <ds:KeyInfo>
                <ds:X509Data>
                    <ds:X509Certificate>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</ds:X509Certificate>
                </ds:X509Data>
            </ds:KeyInfo>
        </KeyDescriptor>
        <SingleSignOnService index="0" Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://identity-provider.com/saml/post"></SingleSignOnService>
        <SingleLogoutService index="0" Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://identity-provider.com/saml/post/logout"></SingleLogoutService>
    </IDPSSODescriptor>
    <Organization>
        <OrganizationName>Monsters</OrganizationName>
        <OrganizationDisplayName>Monsters Inc</OrganizationDisplayName>
        <OrganizationURL>https://movies.disney.com/monsters-inc</OrganizationURL>
    </Organization>
    <ContactPerson contactType="Scarer">
        <GivenName>James</GivenName>
        <SurName>Sullivan</SurName>
        <EmailAddress>james.sullivan@monsters.inc</EmailAddress>
    </ContactPerson>
    <ContactPerson contactType="Sidekick">
        <GivenName>Michael</GivenName>
        <SurName>Wazowski</SurName>
        <EmailAddress>michael.wazowski@monsters.inc</EmailAddress>
    </ContactPerson>
</EntityDescriptor>