Add test for batch change create response

[britneywright]

Wer're only validating the status currently because the output and fixture formatting are not matching.

Intended test was:

@test "batch-change-create" {
  run $ew batch-change-create \
    --json "$(cat tests/fixtures/batch_change_create_json)"

  fixture="$(cat tests/fixtures/batch_change_create)"

  [ "$status" -eq 0 ]
  [ "${output}" = "${fixture}" ]
}

The most recent iteration of the the batch_change_create fixture I made was:

+--------------------+-------------------------------+
| ID                 |
+--------------------+-------------------------------+
| UserName           |
+--------------------+-------------------------------+
| UserID             |
+--------------------+-------------------------------+
| Status             | PendingProcessing             |
+--------------------+-------------------------------+
| Comments           | request on behalf of someone. |
+--------------------+-------------------------------+
| Changes            |
|                    |
|                    |
|                    |
|                    |
|                    |
|                    |
|                    |
|                    |
|                    |
+--------------------+-------------------------------+
| CreatedTimestamp   |
+--------------------+-------------------------------+
| OwnerGroupID       |
+--------------------+-------------------------------+
| ApprovalStatus     | AutoApproved                  |
+--------------------+-------------------------------+
| ReviewerID         |                               |
+--------------------+-------------------------------+
| ReviewerUserName   |                               |
+--------------------+-------------------------------+
| ReviewerTimestamp  |                               |
+--------------------+-------------------------------+
| ReviewComment      |                               |
+--------------------+-------------------------------+
| ScheduledTime      |                               |
+--------------------+-------------------------------+
| CancelledTimestamp |                               |
+--------------------+-------------------------------+