Fixed regression in the RPC module
Fixed regression in the RPC module

Code related to RPC that was moved from the API application to the
global RPC module used an invalid type for the version (float instead of
string).

Change-Id: I0f06cc6324065926b8db05d0015a4a689700c557

muraliselva10/cloudkitty,FNST-OpenStack/cloudkitty,FNST-OpenStack/cloudkitty,muraliselva10/cloudkitty,stackforge/cloudkitty,openstack/cloudkitty,openstack/cloudkitty,stackforge/cloudkitty