[vstest] VOQ system lag vs test timing issue fix #1692
Merged
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What I did
In Virtual chassis test suite, time sleep for 1 second after creating and deleting system lag is replaced by
DVS's wait_for_n_keys() function.
Why I did it
Potential fix for issue #1687.
How I verified it
Ran pytest on docker sonic vs image multiple times with this fix. 100% pass.
Details if related