LU-15339 tests: Increase timeout in sanity 208

LU-15339 tests: Increase timeout in sanity 208

It's been observed that occasionally the initial request in
sanity 208 does not complete in 1 second, which invalidates
the test.  (And sometimes causes it to fail - but even if
it passes, the test is invalid.)

Increase the time to 2 seconds.

Using trivial testing because this just modifies sanity and
it's such a simple change.

Lustre-change: https://review.whamcloud.com/45779
Lustre-commit: dc015fc0b51b95151366b0355cfc90b068d98b01

Test-Parameters: trivial
Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: I70cf32813a9a2ced0cc388eb25eba29918ba7d03
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Nunez <jnunez@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/45931
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>