JIRA: https://jira.spring.io/browse/INT-4573
* Fix check order for headers first in the `resolveObjectName()` and
`resolveOperationName()`.
Then fallback to defaults configured on the `OperationInvokingMessageHandler`
* Remove also a deprecated API in the `OperationInvokingMessageHandler`
* Remove requirements for `object-name` and `operation-name` XML
attributes since those options can be provided in the request message
headers
* Fix `OperationInvokingChannelAdapterParserTests` for proper headers
resolution
* Mention `JmxHeaders.OBJECT_NAME` and `JmxHeaders.OPERATION_NAME`
headers in the `jmx.adoc`
4f34d922c1