Revert "Importing correlation_id middleware from oslo-incubator"

This reverts commit 26ecf7b02377b860b4412aa554ed2392f42f8d40.

This patch was merged in preparation for
https://review.openstack.org/#/c/29480/ which was never merged.

Change-Id: Iefa1478af03f748ccb5f27f8bd4ad0f5b24af070
Merge "Revert "Importing correlation_id middleware from oslo-incubator""