Damian Dabrowski 9355e1dd2d 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: I1c90ce68ce218d538cd89b111dc1ee4142f14eef
2021-12-02 19:18:25 +01:00
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