Update networking-powervm sub-project docs
Update networking-powervm sub-project docs

Update the sub-project documentation to reflect the
rename of the neutron-powervm project to networking-powervm

Change-Id: I716760c8bb318c40fce9ec5131977a1643667a97

chitr/neutron,huntxu/neutron,mahak/neutron,wolverineav/neutron,MaximNevrov/neutron,apporc/neutron,noironetworks/neutron,openstack/neutron,klmitch/neutron,openstack/neutron,sebrandon1/neutron,mahak/neutron,dims/neutron,eayunstack/neutron,igor-toga/local-snat,cloudbase/neutron,noironetworks/neutron,mahak/neutron,bigswitch/neutron,bigswitch/neutron,apporc/neutron,eayunstack/neutron,sebrandon1/neutron,cloudbase/neutron,chitr/neutron,dims/neutron,igor-toga/local-snat,wolverineav/neutron,klmitch/neutron,huntxu/neutron,openstack/neutron,MaximNevrov/neutron