remove references to long dead btls


git-svn-id: https://svn.open-mpi.org/svn/ompi/trunk@28167 63e3feb5-37d5-0310-a306-e8a459e722fe
Fix Coverity CID 971095: minor memory leak


git-svn-id: https://svn.open-mpi.org/svn/ompi/trunk@28170 63e3feb5-37d5-0310-a306-e8a459e722fe
Fix CID 967922: minor memory leak possibility.


git-svn-id: https://svn.open-mpi.org/svn/ompi/trunk@28175 63e3feb5-37d5-0310-a306-e8a459e722fe
Merge changes from trunk.