RootHelperProcess: kill can consume signal number
RootHelperProcess: kill can consume signal number

The kill() method now accepts a signal parameter.

Change-Id: I2eb756a73565d93c979e62eaab358a3a519aa8dd

mattt416/neutron,glove747/liberty-neutron,bigswitch/neutron,takeshineshiro/neutron,klmitch/neutron,sebrandon1/neutron,mmnelemane/neutron,apporc/neutron,mahak/neutron,suneeth51/neutron,skyddv/neutron,MaximNevrov/neutron,barnsnake351/neutron,neoareslinux/neutron,watonyweng/neutron,igor-toga/local-snat,mandeepdhami/neutron,MaximNevrov/neutron,jacknjzhou/neutron,noironetworks/neutron,sasukeh/neutron,vivekanand1101/neutron,paninetworks/neutron,wolverineav/neutron,openstack/neutron,swdream/neutron,adelina-t/neutron,cisco-openstack/neutron,dhanunjaya/neutron,SamYaple/neutron,chitr/neutron,shahbazn/neutron,jumpojoy/neutron,neoareslinux/neutron,bigswitch/neutron,openstack/neutron,swdream/neutron,asgard-lab/neutron,chitr/neutron,igor-toga/local-snat,jacknjzhou/neutron,dims/neutron,JianyuWang/neutron,jumpojoy/neutron,silenci/neutron,eayunstack/neutron,SamYaple/neutron,apporc/neutron,asgard-lab/neutron,vivekanand1101/neutron,eayunstack/neutron,suneeth51/neutron,wenhuizhang/neutron,huntxu/neutron,glove747/liberty-neutron,dims/neutron,javaos74/neutron,adelina-t/neutron,skyddv/neutron,barnsnake351/neutron,cisco-openstack/neutron,klmitch/neutron,huntxu/neutron,dhanunjaya/neutron,cloudbase/neutron,eonpatapon/neutron,javaos74/neutron,yanheven/neutron,mahak/neutron,paninetworks/neutron,yanheven/neutron,openstack/neutron,watonyweng/neutron,takeshineshiro/neutron,wenhuizhang/neutron,wolverineav/neutron,cloudbase/neutron,shahbazn/neutron,eonpatapon/neutron,noironetworks/neutron,silenci/neutron,sebrandon1/neutron,JianyuWang/neutron,mandeepdhami/neutron,mmnelemane/neutron,mattt416/neutron,mahak/neutron,sasukeh/neutron