LU-3088 build: fix 'resource leak' errors

LU-3088 build: fix 'resource leak' errors

Fix 'resource leak' defects found by Coverity version 6.5.1:
Resource leak (RESOURCE_LEAK)
Variable going out of scope leaks the storage it points to.

Signed-off-by: Sebastien Buisson <sebastien.buisson@bull.net>
Change-Id: I12312b081ea735118d5375c0dc9c20ead5ed9286
Reviewed-on: http://review.whamcloud.com/5918
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: John Hammond <johnlockwoodhammond@gmail.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>