Uncount new commits triggered by submodule
Uncount new commits triggered by submodule

This happened in opnfvdocs project, which uses submodule to tirgger
automatically empty updates from other projects' changes, Which causes
every patchset/review in gerrit will be counted twice in commits:
    - one in orignal project
    - the other in opnfvdocs

This patch is used to deal with new coming commits.

Change-Id: I2f074410ade7dd8c8e9f638ebb5dc4cd70e2842e
Signed-off-by: Julien <b3ffa935994ff1e593a340e61f5c58d1a8932d46@zte.com.cn>

stackforge/stackalytics,0xf2/stackalytics,stackforge/stackalytics,0xf2/stackalytics,0xf2/stackalytics,openstack/stackalytics,openstack/stackalytics,stackforge/stackalytics,0xf2/stackalytics,openstack/stackalytics,openstack/stackalytics