Fixes EC2 CreateSnapshotResponse parsing.
Fixes EC2 CreateSnapshotResponse parsing.

mthjones/rusoto,DualSpark/rusoto,rusoto/rusoto,DualSpark/rust-aws,mattico/rusoto,ford-prefect/rusoto,DualSpark/rusoto,ford-prefect/rusoto,cmsd2/rusoto,DualSpark/rusoto,indiv0/rusoto,mthjones/rusoto,mattico/rusoto,rusoto/rusoto,SecurityInsanity/rusoto,SecurityInsanity/rusoto,rusoto/rusoto,mattico/rusoto,noggleboggle/rusoto,DualSpark/rust-aws,DualSpark/rust-aws