[fix] make unit test more robust

git-svn-id: https://spf4j.googlecode.com/svn/trunk@532 d408096a-aa36-d13b-a661-48d75a76e993
[fix] cleanup tests

git-svn-id: https://spf4j.googlecode.com/svn/trunk@533 d408096a-aa36-d13b-a661-48d75a76e993
Merge branch 'master' of https://github.com/zolyfarkas/spf4j