Update PRRTE

- Ensure we accurately handle node name aliases
- Apply the local launch environ to apps prior to spawn
- Add error check if PMIx_Spawn fails
- Fix compiler warning
- Fix PGI vendor check
- Prevent mpirun from hanging if prte segfaults
- Fix absolute/relative path names to ensure "prte" and
  "prted" are taken from same distribution as "mpirun"

Signed-off-by: Ralph Castain <[email protected]>

Author: rhc54