LU-8239 utils: llanalyze drops useful logs

LU-8239 utils: llanalyze drops useful logs

llanalyze should not execute entering_rpc and
leaving_rpc if no rpctrace option set, otherwise wrong
pid is set and usefull logs are skipped.

This patch executes entering_rpc and leaving_rpc
only if rpctrace is set.

Test-Parameters: trivial
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@seagate.com>
Change-Id: I4676b0ca80f8ed314716e9368558489b64825ffa
Reviewed-on: http://review.whamcloud.com/20641
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>