Improves VPNaaS detail page templates

* Change "Tenant ID" to "Project ID"
* Move "Name" and "Description" to the top of the detail pages
* Show "None" if "name" or "description" is empty
* Remove colons from item names in the detail pages
* Remove "VPN type" from VPN service detail
* Arrange the order of items with the same as the creation form
* Print peer_cidrs with for loop

Closes-Bug: #1222260

Change-Id: I2293eb4b87179862c52c1c0bd7852a555955e1c0
Show IPSec Site Connection in VPN service detail

IPSec Site connections associated with VPN service are useful information.
Previously the field "VPN Connections" exist but the associated connections
are not displayed.

Closes-Bug: #1222256

Change-Id: I81da5cc6b63463102c3270fead8921bf8c10d11a
Merge "Improves VPNaaS detail page templates"
Merge "Show IPSec Site Connection in VPN service detail"