test: mark "Create country with name in English" test as stable after migration to Selenium 3.

Relate to #1001
Close #540

Author: php-coder

src/test/robotframework/country/creation/logic.robot

@@ -10,7 +10,6 @@ Force Tags       country  logic
 
 *** Test Cases ***
 Create country with name in English (fill only mandatory fields)
-	[Tags]                            unstable
 	Input Text                        id=name  Germany
 	Submit Form                       id=add-country-form
 	Location Should Be                ${SITE_URL}/country/germany