[LOG4J2-771] Add lookup for application main arguments.
[LOG4J2-787] Add lookup for JVM arguments.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1619026 13f79535-47bb-0310-9956-ffa450edef68
Refactor FindBugs version into one property.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1619028 13f79535-47bb-0310-9956-ffa450edef68
Update Findbugs to 2.5.5 from 2.5.2.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1619029 13f79535-47bb-0310-9956-ffa450edef68