Fix parameters usage for Online Bin tests: nb ts and nb threads
The number of threads was not fixed and our config script which force the OMP default to 1 is not loaded for the test for the online binary (typical case for htis binary which does not need the ROOT env setup).
=> This lead to the test using all available CPUs on computers with modern OS due to the OMP library implementation, stalling our ctest environment (and probably the host machine)
The bonus joke: the number of TS was defined on the cmake side but not used in the test wrapper script, meaning that the test was always running with a single TS for all test models
=>A good hint that the timeout observed in the Nightly tests on Virgo was also linked to the above bug with the number of threads!