BATCH-1908. Added batch inserts to JdbcExecutionContextDao and JdbcStepExecutionDao. Added JobRepository.addAll(Collection<StepExecution>)
BATCH-1908: Minor cleanup/formatting
Merge pull request 142 from dturanski/BATCH-1908

* BATCH-1908:
  BATCH-1908: Minor cleanup/formatting
  BATCH-1908. Added batch inserts to JdbcExecutionContextDao and JdbcStepExecutionDao. Added JobRepository.addAll(Collection<StepExecution>)