input/output/params/published filters do not work

[Xavier Hardy]

```
curl http://localhost:8989/v2/action_executions?limit=1&input={"method":"GET"}
```
returns
```
<result><action_executions/></result>
```

Even though there is an action execution of std.http with the input key method with value GET (among others).

It should filter all executions with the match key value pairs.

```
curl http://localhost:8989/v2/action_executions?limit=1&input={"method":"GET", "url": "http://example.com"}
```
Should display executions with both method = GET and url = http://example.com.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Dougal Matthews (<email address hidden>) on branch: master
Review: https://review.openstack.org/505206
Reason: Abandoning this patch per the Mistral Patch Abandonment guidelines
(https://specs.openstack.org/openstack/mistral-specs/specs/policy/patch-abandonment.html).
If you wish to have this restored and cannot do so yourself, please reach
out via #openstack-mistral on freenode or the OpenStack Dev mailing list.