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Phillip Webb
6ae113c18a
Update `TestcontainersLifecycleBeanPostProcessor` so that containers can actually be started in parallel. Prior to this commit, `initializeStartables` would collect beans and in the process trigger the `postProcessAfterInitialization` method on each bean. This would see that `startablesInitialized` was `true` and call `startableBean.start` directly. The result of this was that beans were actually started sequentially and when the `start` method was finally called it had nothing to do. The updated code uses an enum rather than a boolean so that the `postProcessAfterInitialization` method no longer attempts to start beans unless `initializeStartables` has finished. Fixes gh-38831