osd: handle event notify/info/log from Initial

osd: handle event notify/info/log from Initial

We shouldn't post a creation event and jump into peering/stray based on
pg creation when we are about to process more information or else we will
send out unnecessary queries.  Instead, handle those from Initial and jump
to the appropriate state.

Signed-off-by: Sage Weil <sage.weil@dreamhost.com>