Add missing include statements.
With FairSoft apr21 and/or FairRoot v18.6.2 some implicitly included
header files aren't found any longer. Add include statements for these
header files explicitly.

The class FairLogger is  meanwhile only a wrapper around the Logger class,
so use the Logger directly. This also helps to reduce many warnings when
using the Eclipse IDE.

Administrator authored Apr 01, 2021 and Florian Uhlig committed Apr 01, 2021

The current flesnet version contain all changes/patches which we did so far
when compiling CbmRoot.
The new flesnet version also needs un updated version of cppzmq.
refs. #2068, #2069

Administrator authored Mar 31, 2021 and Florian Uhlig committed Mar 31, 2021

Up to now the ROOT random number generator was always initialised with the
same default value. In some cases this gives strange results when doing
large scale simulations with several jobs.
To solve the problem TRandom is now initialised with the value 0 which uses a
seed value based on the system time with a granularity of 100ns.
This granularity should be good enough to have different seed values even if
several jobs start a similar times on the batch farm.
A setter was added to allow to set the seed value explicitly from a macro,
refs #1395, #2066