Disallow creating project with " in the path

It's not supported by dynamips.

Fix https://github.com/GNS3/gns3-gui/issues/987

gns3server/modules/project.py

@@ -141,7 +141,10 @@ class Project:
 
         if hasattr(self, "_path"):
             if path != self._path and self.is_local() is False:
-                raise aiohttp.web.HTTPForbidden(text="You are not allowed to modify the project directory location")
+                raise aiohttp.web.HTTPForbidden(text="You are not allowed to modify the project directory path")
+
+        if '"' in path:
+            raise aiohttp.web.HTTPForbidden(text="You are not allowed to use \" in the project directory path. It's not supported by Dynamips.")
 
         self._path = path
         self._update_temporary_file()

tests/modules/test_project.py

@@ -102,6 +102,13 @@ def test_changing_path_not_allowed(tmpdir):
             p.path = str(tmpdir)
 
 
+def test_changing_path_with_quote_not_allowed(tmpdir):
+    with patch("gns3server.modules.project.Project.is_local", return_value=True):
+        with pytest.raises(aiohttp.web.HTTPForbidden):
+            p = Project()
+            p.path = str(tmpdir / "project\"53")
+
+
 def test_json(tmpdir):
     p = Project()
     assert p.__json__() == {"name": p.name, "location": p.location, "path": p.path, "project_id": p.id, "temporary": False}