Replace FQCN with simplified name thanks to import.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597511 13f79535-47bb-0310-9956-ffa450edef68
Add defaultValue attribute to @SensitivePluginAttribute.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597512 13f79535-47bb-0310-9956-ffa450edef68
Add PluginVisitors for a few more annotations.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597513 13f79535-47bb-0310-9956-ffa450edef68
Add debug logging to PluginAttributeVisitor.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597514 13f79535-47bb-0310-9956-ffa450edef68
Refactor a few more annotations into their visitor classes.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597515 13f79535-47bb-0310-9956-ffa450edef68