submitquery search by "Description"

[will-moore]

We want to allow users to find studies by Description.

The query submitted to /searchengine/api/v1/resources/submitquery/ should support search by "Description".

E.g. together with #65 and #42 this would look like:

"and_filters": [
  {
    "key": "Description",
    "value": "tumor",
    "operator": "contains",
    "resource": "container"
  }
]