Allowed-Values-Should-Actually-Be-Allowed does not work with Microsoft.Common.Dropdown elements with multiselect

[malscent]

If i have a parameter such as:

"couchbaseServices": {
  "type": "array",
  "defaultValue": [ "data", "index", "query" ]
},

Even if all of those items in the default value are present in a corresponding Microsoft.Common.Dropdown, it will fail

          {
            "name": "couchbaseServices",
            "type": "Microsoft.Common.DropDown",
            "label": "Couchbase Services",
            "multiselect": true,
            "selectAll": true,
            "toolTip": "The services that the primary cluster will utilize",
            "constraints": {
              "allowedValues": [
                {
                  "label": "Data",
                  "value": "data"
                },
                {
                  "label": "Index",
                  "value": "index"
                },
                {
                  "label": "Query",
                  "value": "query"
                },
                {
                  "label": "Search",
                  "value": "fts"
                },
                {
                  "label": "Eventing",
                  "value": "eventing"
                },
                {
                  "label": "Analytics",
                  "value": "analytics"
                },
                {
                  "label": "Backup",
                  "value": "backup"
                }
              ]
            },
            "visible": true
          }

[malscent]

There's also a bug with Microsoft.Common.Dropdown with mutliselect that if a user does not interact with the element, it will return a string value instead of an array value. I've reported that here as I did not know where else to report it

[StartAutomating]

@malscent thanks for pointing this one out. We will see if we can expand this case to handle multiselect.

[bmoore-msft]

should be in #652