Drift: PMIx_tool_set_server_module

Part of https://github.com/openpmix/pmix-tests/pull/158

```
#---------------------------------------------------------
# Needs Review:
#  OpenPMIx: 1c49b2b
#  OpenPMIx PR:
#  PMIx Standard Issue: 
#---------------------------------------------------------
PMIx_tool_set_server_module
```