Added coverage to logout method. -------------
Commit messages: - 8281717: Cover logout method for several LoginModule Changes: https://git.openjdk.java.net/jdk/pull/7940/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7940&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8281717 Stats: 49 lines in 1 file changed: 29 ins; 11 del; 9 mod Patch: https://git.openjdk.java.net/jdk/pull/7940.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/7940/head:pull/7940 PR: https://git.openjdk.java.net/jdk/pull/7940
