BATCH-2096: 'chunk-completion-policy' or 'commit-interval' with '#{jobParameters[...]}' is ignored when 'retry-limit' exists.

* Added a call for a completionPolicy  when creating FaultTolerantStep
* Added an assertion for the chunkCompletionPolicy in the unit test.

JIRA: https://jira.springsource.org/browse/BATCH-2096