fix issue with DeleteChangeSet.
fix issue with DeleteChangeSet.

We cannot delete a changeset in the loop as that will upset OrderedDict.

Signed-off-by: Kai Xia <ac3373fdd73fe9dc67629fee72ab58cf51161921@fastmail.com>

spulec/moto,spulec/moto,spulec/moto,spulec/moto,spulec/moto,spulec/moto