hdf5_ep

Merge pull request #760 in HDFFV/hdf5 from ~LRKNOX/hdf5_lrk:develop to develop

* commit 'b11de4ebc42bf1b7d5dd733654a5ce78410518ba':
  Add check for realtimeOutput environment variable set containing characters to indicate test output should be piped through tee to chklog files in order to send output to stdout as tests run instead of waiting to cat chklog file to stdout when each set of tests is completed.  This should stop buildbot from timing out when a test set doesn't complete in less than 20 minutes.