add disorder test for cleanup interval(bug 350)

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=slony1-engine.git;a=commitdiff;h=afe69d31eeae0c08dd6ce5a03b04a13f076dfd23

Modified Files
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clustertest/disorder/tests/CleanupInterval.js |   60 +++++++++++++++++++++++++
clustertest/disorder/tests/disorder_tests.js  |    2 +
2 files changed, 62 insertions(+)