JetRec: Fix test.
The JetRecAlgTestCfg test was failing because the JetContainer property of JetClusterMomentsTool was never initialized
The test failure wasn't being noticed because there's no reference file.
The JetRecAlgTestCfg test was failing because the JetContainer property of JetClusterMomentsTool was never initialized
The test failure wasn't being noticed because there's no reference file.