Drift: PMIx_tool_is_connected

[jjhursey]

List: https://github.com/openpmix/pmix-tests/blob/08705b12294fc5020f2af951b9bb10b36b6cec8d/check-standard/etc/openpmix_master-pmix-standard_master.txt#L137-L143

#---------------------------------------------------------
# Needs Review:
#  OpenPMIx: 0a9aa8c8b
#  OpenPMIx PR: 
#---------------------------------------------------------
PMIx_tool_is_connected
PMIX_CONNECT_TO_SCHEDULER