- new definition to replace hardcoded values

- The qsort() function is defined as:
  void qsort(void *base, size_t nmemb, size_t size,
    int (*compar)(const void *, const void *));
  and sorts an array with nmemb elements of size size.
- in the gNB scheduling functions, nmemb and size were swapped
- this was causing a stack overflow ending with a SEGFAULT under certain circumstances

- this defition is obsolete

integration_2022_wk50

See merge request oai/openairinterface5g!1869

!1663 UL-MIMO working with 2 layers
!1705 RNTI to UE ID in PDCP, SDAP, GTPU, ...
!1818 Move /targets/user to /executables
!1835 Improve NR SRS configuration
!1837 Add Configuration File Naming Style Guide
!1852 Get data from SRB 1 when generating Msg4
!1857 Use F1AP to transfer SRB1 messages in monolithic mode
!1858 fix NR_LDPC_NUM_BN_GROUPS_BG2_R15
!1862 Fix for msg3 scheduling
!1814 Initial web server implementation
!1847 Move 5G RFsim tests from RAN-CI-develop to RAN-Container-Parent
timeout for RFsim

This will lead to quicker drop of the UE context in the gNB once it
disconnected from RFsim.

The physim tests fail because, typically, the same tests gets assigned
to the same node which then is overloaded. This MR assigns pods to
different nodes to prevent this.

- variable is_secondary_gnb is not used anywhere, so remove
- variable lowmem is not used/defines should be changed, so remove