Restore PDR stat run for NDRPDR

Restore PDR stat run for NDRPDR

Before [0], the NDRPDR test ended with two measurements
that perform runtime stats collection, each 2 seconds long.
[0] then decreased that duration to one second,
and removed the PDR measurement.

This change re-adds the PDR measurement,
while keeping the duration at 1 second.

[0] https://gerrit.fd.io/r/c/csit/+/24427

Change-Id: I76828f11863a9e278cdd0cf60f2792d5b614ce43
Signed-off-by: Vratko Polak <vrpolak@cisco.com>
(cherry picked from commit f7699715f37ee6846bceb1fa7baf51366a683737)