go: fix not returning after 507
go: fix not returning after 507

This causes it to still send container updates and also log a 201
when there isn't space available.

Change-Id: I898f361047e2da9413c7c156672cc2f7e7abd8ca

redbo/hummingbird,creiht/hummingbird,nadeemsyed/hummingbird,troubling/hummingbird,creiht/hummingbird,troubling/hummingbird,nadeemsyed/hummingbird,corystone/hummingbird,corystone/hummingbird,redbo/hummingbird