SDKQE-2442: Fix nodejs view mock tests timeout
SDKQE-2442: Fix nodejs view mock tests timeout

Add a sleep after bucket flush so it completes before the next test runs

Change-Id: I712954a76247c70dc8d0d6acd8c9ad31ece4ec5b
Reviewed-on: https://review.couchbase.org/c/couchnode/+/163592
Tested-by: Jake Rawsthorne <dc8633dae52e1ed0cfa121ac37862f478f70275b@couchbase.com>
Reviewed-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

brett19/couchnode,couchbase/couchnode,couchbase/couchnode,couchbase/couchnode,brett19/couchnode,couchbase/couchnode,brett19/couchnode