Fix a minor typo in a comment
WICKET-5662 @SpringBean(name="something", required=false) still throws org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'something' is defined

(cherry picked from commit 9aec4f332aae9ec380d09dab1c68b0cd15927644)
Ignore the async tests because they fail very often on BuildBot (the CI server)

(cherry picked from commit 2ba7176c11b878542ea72358319c913a8aea1df9)