Additional optional Environment data to heat template selection

Change-Id: I4e0d32e7e032d5c0ec93595c14134e780fa21d66
Implements: blueprint heat-environment-file
Adding resource link to resource detail page in Heat view

Change-Id: I155d0eec5d46be5df1c7d9ea090de39e56fe6c7d
Implements: blueprint heat-stack-detail-resources-column
Fixes description field extension

This patch fixes description field extension
over other fields.

Change-Id: Ied9c71478157ee28d5f0e4af603236df922bb349
Closes-Bug: #1282196
Raise an error when no slug on tab group

When a tab group has no slug defined, it behaves in very strange
ways and the error is hard to find. This will make finding it much
easier.

Change-Id: I97c4cdc7a860e8c40ce17ee1a59384bbf85782ad
Closes-bug: 1288650
Merge "Raise an error when no slug on tab group"
Merge "Additional optional Environment data to heat template selection"
Merge "Adding resource link to resource detail page in Heat view"
Merge "Fixes description field extension"