Corrected Punctuation in quickstart.rst
Corrected Punctuation in quickstart.rst

Punctuation and typo correction.
Changed gb to GB.

Change-Id: I3f9aeef1022bd33106146b1f7a5c23278d6e5f51

openstack/kolla,openstack/kolla,GalenMa/kolla,stackforge/kolla,intel-onp/kolla,mrangana/kolla,GalenMa/kolla,nihilifer/kolla,stackforge/kolla,coolsvap/kolla,stackforge/kolla,mrangana/kolla,coolsvap/kolla,rahulunair/kolla,intel-onp/kolla,rahulunair/kolla,coolsvap/kolla,nihilifer/kolla