Update getting started guide
Update getting started guide

Change-Id: I98b8018e676c76e32f09486bc4c8a85adf93c4b3

openstack/solum,gilbertpilz/solum,gilbertpilz/solum,ed-/solum,gilbertpilz/solum,ed-/solum,gilbertpilz/solum,ed-/solum,devdattakulkarni/test-solum,stackforge/solum,devdattakulkarni/test-solum,stackforge/solum,ed-/solum,openstack/solum