Added curl_tests to tests.toml schema.

[orhtej2]

Allow defining the curl_tests section

[default]
    [default.curl_tests]
    suite1.logged_on_sso = true
    suite1.expect_return_code = 401

    suite2.base_url = "https://why-would-you-do-that.com"
    suite2.path = "/new/path/"
    suite2.logged_on_sso = true
    suite2.expect_title = "awesome title"
    suite2.expect_content = "Denied, lol"
    suite2.expect_return_code = 418
    suite2.expect_effective_url = "https://why-would-you-do-that.com/new/path/redirected"
    suite2.auto_test_assets = false

[orhtej2]

These should have been patternProperties not properties, will actually test before re-releasing

[orhtej2]

Tested against my_webdav_ynh, now it passes.