Changes of nonblocking collectives in e98d794e8b and f750c6932c are applied to persistent collectives. Signed-off-by: KAWASHIMA Takahiro <t-kawashima@jp.fujitsu.com> (cherry picked from commit 357531847e819bf8c33224e0cc9004ed47b42445)
Signed-off-by: KAWASHIMA Takahiro <t-kawashima@jp.fujitsu.com> (cherry picked from commit 4a0a2598f63b081045fdeb51256493ce2a8ec96a)
Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>