Merge pull request #2889 from metabase/move-metabase-mock-namespaces

test/metabase/mock/moviedb.clj

test/metabase/mock/schema_per_customer.clj

test/metabase/mock/toucanery.clj

test/metabase/sync_database/introspect_test.clj

test/metabase/sync_database/sync_dynamic_test.clj

test/metabase/sync_database/sync_test.clj

test/metabase/test/mock/moviedb.clj

test/metabase/test/mock/schema_per_customer.clj

test/metabase/test/mock/toucanery.clj