Dashboard: Incorrect behaviour with YAQL expressions

[Timur Nurlygayanov]

Steps to reproduce:

1)Create Environment with AD
2)Deploy

Observed:
API receives incorrect value for YAQL fields:
{
            "updated": "2013-08-22T12:58:28",
            "environment_id": "264b6ad2aacc4afeaee57b832f53647a",
            "description": {
                "domain": "ad2.local",
                "availabilityZone": "nova",
                "name": "ad2.local",
                "adminPassword": "***************",
                "id": "a0e2e046dba94d94b719bcdce5802a2e",
                "created": "2013-08-22 12:52:13.205068",
                "updated": "2013-08-22 12:52:13.205086",
                "unitNamingPattern": "",
                "osImage": "ws-2012-std",
                "adminAccountName": "Administrator",
                "units": [
                    {
                        "name": "ad2.local_instance_0",
                        "isMaster": true,
                        "location": "west-dc",
                        "recoveryPassword": {
                            "YAQL": "$.recoveryPassword"
                        },
                        "id": "4d1ed5735f074592af1b860882add237"
                    }
                ],
                "flavor": "m1.medium",
                "configuration": "standalone",
                "type": "activeDirectory",
                "slug": "active-directory"
            },
            "created": "2013-08-22T12:58:27",
            "started": "2013-08-22T12:58:27",
            "finished": "2013-08-22T12:58:28",
            "state": "success",
            "id": "5af3b3e91c5846de84deb7bd7f15cd53"
        }

YAQL Field is no handled