Issue #2383755 by slashrsm: Chase head.
Merge pull request #30 from slashrsm/2383755

Chase HEAD - rename _content to _controller in routes
by slashrsm: Fix test that we broke with route HEAD chasing.
Merge pull request #32 from slashrsm/fix_controller_test_fail

by slashrsm: Fix test that we broke with route HEAD chasing.
Merge remote-tracking branch 'upstream/8.x-1.x' into 2291249