Task #7573: Provide mock QPID classes in C++ to prevent a compile-time dependency on QPID. Note that the Python framework exposes lofar.messagebus.msgbus.enabled instead, but has no non-QPID fallback functionality

Task #7543: Fixed Cobalt block-size calculations for sub-second integation times, and improved comments

- rework recvmmsg() wrapper, so we can reuse it for APERTIF. Main purpose is to allow verification of incoming datagram sizes in real-time mode from recvmmsg().
- fix small bug wrt input statistics in non-real-time mode
- fix small bug wrt setReadBufferSize() (unused): THROW_SYSCALL() instead of perror()
- minor simplification / clean ups, e.g. merge/unify packet size check into validatePacket()

Disadvantage of the patch is that struct iovec is no longer contained in our recvmmsg() wrapper.
All tests pass on cbt009.

Task #7519: Put LOGGER_ENTER_THREAD and LOGGER_EXIT_THREAD into a struct, and use it in Cobalt to do proper C++ RAII. Reason is to also use it in APERTIF. Trivial; compile tested.

Taskk #7336: Also switch cbm009/cbm010 between versions in production, just in case they will be used

Task #7360: ObservationControl will wait ObservationControl.finalStateDelay seconds before reporting the final state to the MACScheduler.

Task #7490: reintegrate merge with the trunk. All Online_Cobalt tests pass. ('Move createStream from RTCP to LCS Stream and clean up')

Task #7490: fix tTABTranspose for patched SocketStream. Strictly speaking, the now patched aspect was already wrong in the test.

Also:
- Move deadline check from createStream() into SocketStream().
- Get rid of unused code in an old attempt by me to refactor createStream().
- Fix inverted check > 0 vs < 0 on one of the 2 usleep()s to back-off connect() in SocketStream().
- Move EndOfStreamException and TimeOutException out of their classes (and fix up users).
- Replace readdir() by readdir_r(). Probably irrel since only retval checked vs 0.
- Clarify ~FileDescriptorBasedStream() somewhat, only delay cancellation if actually calling close().
- Constify a few local vars in SocketStream.cc.

Reason: In APERTIF, we need to receive UDP frames from the FPGA correlator.
We can live with LOFAR Common and Stream, but prefer not to have CoInterface just for createStream().
(All other network communication will be done via QPID messaging middleware.)

Build tested only.