Fix RPC version to be a string
Fix RPC version to be a string

The RPC version was being passed as a float which caused an
exception.

Change-Id: I2a2888fcafcc426009fc841b81049a22e072ce75
Closes-Bug: #1467087

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