Due to developer confusion over nomenclature, the ID was used in lieu of
the Application property of `Layout`. `layout.Application` holds the
user-facing name for a particular layout, and is what should be paired
with a measurement name in the `/mappings` endpoint.
Before
------
```
% curl http://localhost:8888/chronograf/v1/mappings
{
"mappings" : [
{
"name" : "18aed9a7-dc83-406e-a4dc-40d53049541a",
"measurement" : "disk"
}
]
}
```
After
-----
```
% curl http://localhost:8888/chronograf/v1/mappings
{
"mappings" : [
{
"measurement" : "disk",
"name" : "User Facing Application Name"
}
]
}
```
Connect #326
This populates the /mappings with data found in the LayoutStore. It uses
the ID for the layout as the mappings Name and pulls the Measurement
from there as well.
Chris Goller
Tim Raymond
nathan haugo
gunnaraasen