LU-1538 tests: clarify conf-sanity test_49 failures

LU-1538 tests: clarify conf-sanity test_49 failures

Clean up the code for conf-sanity.sh test_49 to allow easier debugging
of test failures, which were seen intermittently during development.

Also clean up the coding style to match current guidelines.

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: Iac60fd89c5f193bfa11d9223e75ae947c8b6e186
Reviewed-on: http://review.whamcloud.com/6207
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>