ZeroMQ sending: Ensure data consistency between data and macro pulse number

[mhier]

Follow up for #12, depends on ChimeraTK/DeviceAccess#25
Use the data consistency group (see ChimeraTK/DeviceAccess#25) to ensure the macro pulse number is always consistent with the data.

If #15 is already done, make sure to ensure data consistency there as well.

[killenb]

There is a first implementation on the master. It calls updateDoocsBuffer twice: Once for each macro pulse update and once for the data itself. It does not have a "performance optimisation" that the function pointer dereferencing is only done after checking the consistency group.

Please check if the performance is sufficient. If so please close the ticket, otherwise assign it back to me.

[mhier]

Performance seems not bad right now. There is still potential for optimisation, I will create a separate ticket for this (#29).