Collection queries with old query param

When exporting ATCollection items the queries might contain outdated configurations. The following query doesn’t work in Plone 5 with plone.app.querystring > 1.3.2 (https://github.com/plone/plone.app.querystring/blob/master/CHANGES.rst#1312-2015-11-26)

```json
"query": [
{
"i": "portal_type",
"o": "plone.app.querystring.operation.selection.is",
"v": [
"News Item"
]
},
{
"i": "path",
"o": "plone.app.querystring.operation.string.relativePath",
"v": "../"
}
],
```

The correct version would be:

```json
"query": [
{
"i": "portal_type",
"o": "plone.app.querystring.operation.selection.any",
"v": [
"News Item"
]
},
{
"i": "path",
"o": "plone.app.querystring.operation.string.relativePath",
"v": "../"
}
],
```

With `plone.app.querystring` there is an upgrade step available (8 -> 9) which you can run to fix imported collections with the wrong queries.

Besides that, should we add some logic to adjust the queries on export/import?

Start by reviewing the example collection queries and the plone.app.querystring CHANGES.rst entry linked in the issue, then inspect the existing export/import behavior. The issue does not name source files or tests; completion would require deciding whether query adjustment belongs in export, import, or both, and defining how outdated configurations are handled.

Written by the indexing model from the issue text.