Compiling with unit test not possible, single_channel_server.hpp-file missing

[kletze]

There is no single_channel_server.hpp-file in code/server/include/rpiasgige
Compiling with the unit-test option fails with the following error message:

ingle_channel_server_test.cpp:4:10: fatal error: rpiasgige/single_channel_server.hpp: No such file or directory
    4 | #include "rpiasgige/single_channel_server.hpp"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.