SAML support (#3494)

* PLT-3073: Implement SAML/Okta Server side (EE) (#3422)

* PLT-3137 Support for SAML configuration

* PLT-3410 SAML Database Store

* PLT-3411 CLI to add Identity Provider Certificate and Service Provider Private Key

* PLT-3409 SAML Interface for EE

* PLT-3139 Handle SAML authentication server side

* Add localization messages

* PLT-3443 SAML Obtain SP metadata

* PLT-3142 Login & Switch to/from SAML

* Remove Certs for Database & Clean SAML Request

* Make required Username, FirstName and LastName

* PLT-3140 Add SAML to System Console (#3476)

* PLT-3140 Add SAML to System Console

* Move web_client functions to client.jsx

* Fix issues found by PM

* update package.json mattermost driver

* Fix text messages for SAML

config/config.json

@@ -166,5 +166,23 @@
         "DefaultServerLocale": "en",
         "DefaultClientLocale": "en",
         "AvailableLocales": ""
+    },
+    "SamlSettings": {
+        "Enable": false,
+        "Verify": false,
+        "Encrypt": false,
+        "IdpUrl": "",
+        "IdpDescriptorUrl": "",
+        "AssertionConsumerServiceURL": "",
+        "IdpCertificateFile": "",
+        "PublicCertificateFile": "",
+        "PrivateKeyFile": "",
+        "FirstNameAttribute": "",
+        "LastNameAttribute": "",
+        "EmailAttribute": "",
+        "UsernameAttribute": "",
+        "NicknameAttribute": "",
+        "LocaleAttribute": "",
+        "LoginButtonText": ""
     }
 }