Remove useless log from periodic_sync_routers_task
Remove useless log from periodic_sync_routers_task

Logging that peridoic_sync_routers_task is starting with fullsync
False just adds noise to devstack logs.  Reposition the log
statement to indicate that the task is starting if it is going
to be doing real processing.

Change-Id: I73def1e20218b01c135769d0b8fbce449dad17ea
Signed-off-by: Ryan Moats <7ac70bcc48c94124ee1b01a4779bf5a8a6faebbd@us.ibm.com>

huntxu/neutron,sebrandon1/neutron,takeshineshiro/neutron,mahak/neutron,jumpojoy/neutron,igor-toga/local-snat,openstack/neutron,shahbazn/neutron,dims/neutron,openstack/neutron,sebrandon1/neutron,glove747/liberty-neutron,glove747/liberty-neutron,apporc/neutron,asgard-lab/neutron,MaximNevrov/neutron,yanheven/neutron,dims/neutron,SamYaple/neutron,vivekanand1101/neutron,chitr/neutron,mahak/neutron,mahak/neutron,JianyuWang/neutron,wolverineav/neutron,bigswitch/neutron,cloudbase/neutron,apporc/neutron,MaximNevrov/neutron,SamYaple/neutron,klmitch/neutron,dhanunjaya/neutron,vivekanand1101/neutron,jumpojoy/neutron,eayunstack/neutron,mattt416/neutron,noironetworks/neutron,openstack/neutron,chitr/neutron,mattt416/neutron,igor-toga/local-snat,wolverineav/neutron,shahbazn/neutron,yanheven/neutron,klmitch/neutron,bigswitch/neutron,JianyuWang/neutron,swdream/neutron,swdream/neutron,dhanunjaya/neutron,eayunstack/neutron,huntxu/neutron,takeshineshiro/neutron,noironetworks/neutron,asgard-lab/neutron,cloudbase/neutron