MWDI://v1/provide-list-of-cached-devices respond with incorrect format of the data

[latta-siae]

The new api: /v1/provide-list-of-cached-devices

is responding with incorrect format of the data:

	"mount-name-list": [
		{"mount-name": "305251234"},
		{"mount-name": "305251234"},
		{"mount-name": "505857816"},
	]
}

instead of (as a spec)

  "mount-name-list": [
    "305251234",
    "105258888"
  ]
}

Impact: other modules will not work.