Move test_size and bind_fid to common code.
Move wait_for_completion to common code and change simple/pingpong.c to
work with wait_for_completion.
Merge remote-tracking branch 'upstream/master' into upcommit
Remove bind_fid. Update test_size. Use max_msg_size in ud_pingpong.
Merge pull request #44 from soniczhao/upcommit

Move test_size, bind_fid and wait_for_completion to common code.