release-22.2:Backport!6783

Merged Andrey Vertiprahov requested to merge cherry-pick-2aadce59 into release-22.2

#1926 (closed) Huawei.MA5600T. Fix allow_empty_response for pattern_more send.

See merge request !6783 (merged)

(cherry picked from commit 2aadce59)

3ced65db Huawei.MA5600T. Fix allow_empty_response for pattern_more send. f2569069 Add pattern_more.

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