Update cliff version to 1.4.3 in requirements.txt
Update cliff version to 1.4.3 in requirements.txt

cliff 1.4.3 fixed the encoding output issues,
So update cliff version in file requirements.txt

Fixes bug #1189112

Change-Id: If3bd7da80b204c41c714fd68373be6798b322e8d

openstack/python-neutronclient,varunarya10/python-neutronclient,NeCTAR-RC/python-neutronclient,venusource/python-neutronclient,citrix-openstack-build/python-neutronclient,Juniper/python-neutronclient,venusource/python-neutronclient,asadoughi/python-neutronclient,vijayendrabvs/ssl-python-neutronclient,vijayendrabvs/ssl-python-neutronclient,cryptickp/python-neutronclient,roaet/python-neutronclient,vichoward/python-neutronclient,johnpbatty/python-neutronclient,eayunstack/python-neutronclient,openstack/python-neutronclient,JioCloud/python-neutronclient,cryptickp/python-neutronclient,mangelajo/python-neutronclient,asadoughi/python-neutronclient,citrix-openstack-build/python-neutronclient,rackerlabs/rackspace-python-neutronclient,johnpbatty/python-neutronclient,yamahata/python-tackerclient,roaet/python-neutronclient,ntt-sic/python-neutronclient,huntxu/python-neutronclient,JioCloud/python-neutronclient,ntt-sic/python-neutronclient,sajuptpm/python-neutronclient-ipam,varunarya10/python-neutronclient,Juniper/python-neutronclient,noironetworks/python-neutronclient,cernops/python-neutronclient,sajuptpm/python-neutronclient-ipam,noironetworks/python-neutronclient,cernops/python-neutronclient,NeCTAR-RC/python-neutronclient,eayunstack/python-neutronclient,Stavitsky/python-neutronclient,mangelajo/python-neutronclient,Stavitsky/python-neutronclient,rackerlabs/rackspace-python-neutronclient,vichoward/python-neutronclient,huntxu/python-neutronclient,yamahata/python-tackerclient