Doc fixes

[rbrady]

There is a problem here: When each node of the Workload cloud starts it will gather its configuration metadata from Heat Templated configuration files on the node are updated with values from the metadata

• Ubuntu should be capital U I think
• s/next step is construct a deployment plan/next step is to construct a deployment plan/
• s/floating ips,/floating IPs,/
• s/ Heat client cli / Heat client CLI /
• mimics the root file structure. <-- no colon there, but you have one in other similar places
• s/post heat completion/post Heat completion/ ??
• s/configure certificates and finally registers the initial identity endpoint. /configures certificates, and finally registers the initial identity endpoint. /