Update Sites(Group)-Manage Site Variables

Number of APIs: 3

1. getSiteIDByName_sitevars GET https://{{host}}/api/v1/orgs/:orgr_id/sites

2. getSiteSettings_sitevars GET https://{{host}}/api/v1/sites/:site_id/setting

3. updateSiteSettings_sitevars PUT https://{{host}}/api/v1/sites/:site_id/setting