Container provider override API (#418)

* Implement override API

* Add tests

* Update changelog

Author: rmk135

docs/main/changelog.rst

@@ -12,6 +12,9 @@ Development version
 - Implement context manager interface for resetting a singleton provider.
   See issue: `#413 <https://github.com/ets-labs/python-dependency-injector/issues/413>`_.
   Thanks to `@Arrowana <https://github.com/Arrowana>`_ for suggesting the improvement.
+- Implement overriding interface to container provider.
+  See issue: `#415 <https://github.com/ets-labs/python-dependency-injector/issues/415>`_.
+  Thanks to `@wackazong <https://github.com/wackazong>`_ for bringing up the use case.
 
 4.28.1
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