Tidy up README.rst
Tidy up README.rst

There was a The that should have been a To at minimum, but I
just reworded the sentence.  Also removed a pronoun.

I left the remainder of the pronouns in place so that Operators
know we are human beings :)

Change-Id: I9e64c2a7b85fa45a7ff03adf143aafaa3c463169

stackforge/kolla,intel-onp/kolla,tonyli71/kolla,toby82/kolla,coolsvap/kolla,nihilifer/kolla,negronjl/kolla,coolsvap/kolla,mrangana/kolla,tonyli71/kolla,dardelean/kolla-ansible,openstack/kolla,mandre/kolla,stackforge/kolla,mandre/kolla,rahulunair/kolla,stackforge/kolla,GalenMa/kolla,coolsvap/kolla,intel-onp/kolla,dardelean/kolla-ansible,toby82/kolla,nihilifer/kolla,dardelean/kolla-ansible,openstack/kolla,mrangana/kolla,negronjl/kolla,toby82/kolla,negronjl/kolla,mandre/kolla,rahulunair/kolla,GalenMa/kolla