Fix typo NEUTON to NEUTRON

Fixes bug: #1269111

Change-Id: Icf66b4d474698b5f3ca22bc656ecd12d03164bce
Fix stop_neutron metadata agent function

Currently, stop_neutron fails in Jenkins because it kills itself.
This patch ensure we kill only neutron metadata agent, and not the awk
process in itself.

Change-Id: I25d1d90e002fa9eb3c5bc366cc74cb70a2daa69f
Closes-bug: #1269982
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Merge "Fix typo NEUTON to NEUTRON"
Merge "Fix stop_neutron metadata agent function"