Feature/merge 3 0 develop (#298)

* merging 3.0 into develop

* N°5102 - Allow to send emails (eg. notifications) using GSuite SMTP and OAuth
* migration to iTop 3.1

Co-authored-by: Eric Espie <eric.espie@combodo.com>

lib/thenetworg/oauth2-azure/.vscode/launch.json

@@ -0,0 +1,27 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch application",
+            "type": "php",
+            "request": "launch",
+            "program": "${workspaceFolder}/index.php",
+            "cwd": "${workspaceFolder}",
+            "port": 9000
+        },
+        {
+            "name": "Listen for XDebug",
+            "type": "php",
+            "request": "launch",
+            "port": 9000
+        },
+        {
+            "name": "Launch currently open script",
+            "type": "php",
+            "request": "launch",
+            "program": "${file}",
+            "cwd": "${fileDirname}",
+            "port": 9000
+        }
+    ]
+}