[first-app] Update the links to OpenStack SDK
[first-app] Update the links to OpenStack SDK

Also, change table style with list-table
to read and write the long sentence easily.

Change-Id: I38e7bd5c636fc6a3a17ce3b7f04ab5b995802933
Closes-Bug: #1453651

openstack/api-site,Tesora/tesora-api-site,dreamhost/api-site,Tesora/tesora-api-site,Tesora/tesora-api-site,openstack/api-site,dreamhost/api-site,Tesora/tesora-api-site,openstack/api-site,dreamhost/api-site,dreamhost/api-site,dreamhost/api-site,dreamhost/api-site,dreamhost/api-site,Tesora/tesora-api-site,Tesora/tesora-api-site,Tesora/tesora-api-site,openstack/api-site