[Yahoo-eng-team] [Bug 1259229] [NEW] Undesired migrate repository path caching.

Public bug reported: Oslo.db migration.py uses singleton to store defined `migrate.versioning.repository.Repository` instance containing migration repository path. Most of plugins have its own migrate repo. Usage of singleton in point of Repository instances causes implicit and unexpected behavior

[Yahoo-eng-team] [Bug 1259229] [NEW] Undesired migrate repository path caching.

You have been subscribed to a public bug: Oslo.db migration.py uses singleton to store defined `migrate.versioning.repository.Repository` instance containing migration repository path. Most of plugins have its own migrate repo. Usage of singleton in point of Repository instances causes implicit an