Changes to Get connector instance

added the optional property message to the response with the 400 status

the endpoint scheme security bearerAuth was added to the API

the endpoint scheme security denApiKey was added to the API

added the optional property capability to the response with the 400 status

removed the pattern ^cin_.* from the path request parameter connectorInstanceId

the item/connectorAccountId response's property pattern ^cac_.* was removed for the status 200

the item/createdByOrgMembershipId response's property pattern ^om_.* was removed for the status 200

the item/id response's property pattern ^cin_.* was removed for the status 200

the item/organizationId response's property pattern ^org_.* was removed for the status 200