OPENDJ-832 (CR-1545) Leverage the work queue for processing requests received on the HTTP connection handler



Added logging for CONNECT / DISCONNECT operations. All LDAP inner operations are already logged.
Ensured the inner operations are not logged by default.



LDAPClientConnection.java, LDAPConnectionHandler.java:
Moved the disconnect logging from LDAPClientConnection ctor to LDAPConnectionHandler.acceptConnection() in line with other calls to disconnect logging.

HTTPClientConnection.java:
Moved the disconnect logging from HTTPClientConnection ctor to CollectClientConnectionsFilter..doFilter() in line with other calls to disconnect logging.
In sendIntermediateResponseMessage(), throw an exception.
In disconnect(), removed the connection from the connection handler + log the disconnect.

HTTPConnectionHandler.java:
Added addClientConnection() and removeClientConnection().

CollectClientConnectionsFilter.java:
In doFilter(), called HTTPConnectionHandler.addClientConnection() and do not remove the client connection because it is removed when Rest2LDAP calls Connection.close() + called logConnect() + call client disconnect if we sent back the unauthorized status code.

ClientConnection.java
Added isInnerConnection().

Operation.java, AbstractOperation.java, OperationWrapper.java:
Added isInnerOperation() and setInnerOperation().

AbstractTextAccessLogPublisher.java:
Called Operation.isInnerOperation() and ClientConnection.isInnerConnection() instead of checking the connectionID.

AbstractTextAccessLogPublisherTest.java:
Updated the test.

SdkConnectionAdapter.java
In enqueueOperation(), setInnerOperation().
In close(UnbindRequest, String), do not issue run the UnbindOperation if we were not authenticated, but issue a disconnect log message.