add opal_hash_table_get_{first,next}_key_ptr
fix misc memory leaks
fix misc memory leaks specific to the master
fix hangs introduced by previous commit a6744b81777ab8247908350bd15cca49bedf5208
OOB UD: fix case when multiple oob components were specified in command line (checking of uri).
Merge pull request #287 from nkogteva/oob_ud

OOB UD: fix case when multiple oob components specified in command line
Some minor cleanup. We really don't need another peer error constant to indicate that a peer closed as we already have one for "connection failed", and that's all we really know. Update the orte constants to track their opal equivalents.