Proposing Xavier Simonart as a commiter in samplevnf

Proposing Xavier Simonart as a commiter in samplevnf

Xavier Simonart has contributed greatly to SampleVNF E/F/G release.

Achievement/Contributions include:
 - Provided quite many high-quality review comments.
 - Enhanced PROX VNF and added new feature to PROX.
 - Fixed multiple Bugs in PROX VNF.
 - Jenkins verify test evolvement.
 - SampleVNF Architecture Improvement.

https://gerrit.opnfv.org/gerrit/#/q/owner:%22Xavier+Simonart%22+project:samplevnf

Change-Id: Iccd9c95e856269277ff09572e92e9fda7288734e
Signed-off-by: Deepak S <deepak.s@linux.intel.com>