Add test for GET /op/definition that provides a jsonPathQuery parameter

[cd-rite]

PR #1531 includes an update to JsonPath module, but I noticed we do not have coverage in the tests for that endpoint when provided with a jsonPathQuery param. The only test expects the default response.

opId: getDefinition

Pass a JsonPathQuery string that refines the response to that portion of the api schema (for example: $.components.schemas.RoleId)
Check that endpoint responds successfully , with proper portion of spec

Note, I informally tested with the new JsonPath update, and it does work, so I'll merge that PR

[cd-rite]

resolved by: #1539