Oleg Bondarev 22250e783b Set DB retry for quota_enforcement pecan_wsgi hook
The hook starts a DB transaction and should be covered with
DB retry decorator.

For Rocky backport had to import neutron_lib.db for retry_db_errors.

Closes-Bug: #1777965
Closes-Bug: #1771293
Change-Id: I044980a98845edc7b0a02e3323a1e62eb54c10c7
(cherry picked from commit ab286bcdaccb788ab9df3186e0605e93a9b10bbc)
(cherry picked from commit 3ec7aed8a367ba2a44fed300b08797e02fc47e06)
2019-12-09 12:08:47 +00:00
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