remove obsolete test
improve integration test execution time

added a new ClassLifecycleIntegrationTest class that will
keep its state until all test methods of a test class are
run. This performs a lot better than wiping all
templates/indices and re-create them for each test method.

currently only some methods from ShardStatsTest have been
moved to SysShardsTest (saving about 20 secs on a simple
test)