Pass parent object to connection during execution
Pass parent object to connection during execution

The ability to create custom edge types was recently added and, with it,
the ability to pass a `parent` object through connections for use in the
connection and custom edge type. However, we forgot to actually _pass_
the parent object in during query execution, so it ended up always being
`nil`. This patch fixes the failing test introduced in the previous
commit.

Signed-off-by: David Celis <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@davidcel.is>

nevesenin/graphql-ruby,musicglue/graphql-ruby,nevesenin/graphql-ruby,nevesenin/graphql-ruby,xuorig/graphql-ruby,rmosolgo/graphql-ruby,rmosolgo/graphql-ruby,nevesenin/graphql-ruby,rmosolgo/graphql-ruby,xuorig/graphql-ruby,rmosolgo/graphql-ruby,xuorig/graphql-ruby