Fix race condition in test for *FileID functions
Fix race condition in test for *FileID functions

In this test the “file ID” of a temporary file is compared against the
file ID gathered via an open file descriptor to the same file. For
reasons unknown to me utime(2) is called in-between to update the
inode's a- and mtime. Depending on the file system's timestamp
resolution this can lead to a different file ID.

Found by chance during QA and reproduced by adding a delay before the
call to utime(2).

Signed-off-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>
Reviewed-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>

apyrgio/snf-ganeti,mbakke/ganeti,bitemyapp/ganeti,grnet/snf-ganeti,apyrgio/snf-ganeti,apyrgio/ganeti,leshchevds/ganeti,mbakke/ganeti,apyrgio/ganeti,ganeti/ganeti,yiannist/ganeti,andir/ganeti,leshchevds/ganeti,onponomarev/ganeti,yiannist/ganeti,mbakke/ganeti,bitemyapp/ganeti,ganeti/ganeti,yiannist/ganeti,grnet/snf-ganeti,ganeti-github-testing/ganeti-test-1,ganeti-github-testing/ganeti-test-1,dimara/ganeti,andir/ganeti,leshchevds/ganeti,dimara/ganeti,onponomarev/ganeti,ganeti/ganeti,andir/ganeti