Add rfc.sh.
Add rfc.sh.

This is a tool to help with submitting changes to gerrit.

Change-Id: I962c8e79bf10d881548a9c258065fb83a5d89cb4

CCI-MOC/python-novaclient,citrix-openstack-build/python-novaclient,guptaankita/python-novaclient,metacloud/python-novaclient,CCI-MOC/python-novaclient,Shihta/python-novaclient,ntt-sic/python-novaclient,ntt-sic/python-novaclient,metacloud/python-novaclient,takeshineshiro/python-novaclient,mat128/python-novaclient,takeshineshiro/python-novaclient,citrix-openstack-build/python-novaclient,mat128/python-novaclient,akash1808/python-novaclient,Shihta/python-novaclient,akash1808/python-novaclient,JioCloud/python-novaclient,JioCloud/python-novaclient,guptaankita/python-novaclient