Expose package dimension name and value through runtime mojit details

With this change, it is possible to know at runtime if a mojit comes from a dimension experiment package, through properties `dimensionName` and `dimensionValue` of the mojit details meta data.

For example:
With the following config:
```
 "settings": [ "experiment_foo:EXP002"]
```
The following properties are added to the mojit details meta data:
```
{
    "dimensionName": "experiment_foo",
    "dimensionValue": "EXP002"
}
```

You can get the info at runtime from the resource store like this:
```
var details = rs.resolveVersion(mojitType, 'server', posl),
     dimension = details.dimensionName;
```

/cc @jarnoux @jlecomte