Span or queryedit

Matches the union of its span clauses. Here is an example:

response = client.search(
  body: {
    query: {
      span_or: {
        clauses: [
          {
            span_term: {
              field: 'value1'
            }
          },
          {
            span_term: {
              field: 'value2'
            }
          },
          {
            span_term: {
              field: 'value3'
            }
          }
        ]
      }
    }
  }
)
puts response
GET /_search
{
  "query": {
    "span_or" : {
      "clauses" : [
        { "span_term" : { "field" : "value1" } },
        { "span_term" : { "field" : "value2" } },
        { "span_term" : { "field" : "value3" } }
      ]
    }
  }
}

The clauses element is a list of one or more other span type queries.