Damian Dabrowski 5f599df051 Database connection pooling improvements
- Implemented new variable ``connection_recycle_time`` responsible for SQLAlchemy's connection recycling
- Set new default values for db pooling variables which are inherited from the global ones.

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible/+/819424
Change-Id: I4fd6de7ca38d561306e8c868c063b68edeafc68a
2021-12-03 11:40:51 +01:00
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