Don't use RSEND to avoid race condition where received may not have allocated buffer

git-svn-id: https://svn.mcs.anl.gov/repos/exm/sfw/lb/trunk@7545 dc4e9af1-7f46-4ead-bba6-71afc04862de
Reorg


git-svn-id: https://svn.mcs.anl.gov/repos/exm/sfw/lb/trunk@7741 dc4e9af1-7f46-4ead-bba6-71afc04862de
Fix memory leak from unnecessary duplication of filename

git-svn-id: https://svn.mcs.anl.gov/repos/exm/sfw/lb/trunk@8044 dc4e9af1-7f46-4ead-bba6-71afc04862de