Merge branch '170-tenable-io-onboarding' into 'master'

Try using emailAddress nameid

Closes #170

See merge request !267

nefed.xml

@@ -17128,7 +17128,7 @@ KNGked4df0r1o5CozJ35FjKx1fiYucuvGXU+UZd5Yg6sF6MRhQqud32X3eOFJXS/ndm/jGit7B6A
         </Extensions>
         <SPSSODescriptor AuthnRequestsSigned="false" WantAssertionsSigned="true"
             protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
-            <NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:persistent</NameIDFormat>
+            <NameIDFormat>urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress</NameIDFormat>
             <AssertionConsumerService
                 Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"
                 Location="https://cloud.tenable.com/saml/login/91c3ce05-8c0e-405e-9f54-5f69382f5ee9"