code review for jvmstat/jps fix (6954420)

[Daniel D. Daugherty]

Greetings,

I have a fix for the following jvmstat/jps bug:
6954420: 2/4 jps shows "process information unavailable" sometimes
Summary: Make sure the backing store file is flushed in 
create_sharedmem_resources() and get_user_name_slow() no longer checks 
the size of the backing store file.
Reviewed-by:

Here is the URL for the webrev:

   http://cr.openjdk.java.net/~dcubed/6954420-webrev/0/

Thanks, in advance, for any reviews.

Dan