move copy-config-back-to-AR::Configurations to switchman.rake

it's only needed by db:structure:dump task, and doing it automatically
correctly would involve a performance hit (a hash dup for every
time we get a connection from the default pool)

Change-Id: I67caa19ff939ecb84017ab49438beda405b350b4
Reviewed-on: https://gerrit.instructure.com/38326
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jon Jensen <jon@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>
bump version

Change-Id: I25f425a910a38341e9932c3b7359840157268412