Replace boost hash usage with TfHash in pxr/usd/sdf (except SdfPath) #2181
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Description of Change(s)
Requires #2173
To remove the dependency of pxr/usd/sdf on boost's hashing functions
__hash__
added toSdfAssetPath
,SdfPayload
,SdfListOp
, andSdfReference
.SdfListOp
,SdfReference
,SdfPayload
, andSdfValueTypeName
boost::hash_combine
usage replaced withTfHash::Combine
SdfPath
will be put into its own PR so it's easier to back out this fundamental and commonly hashed type without affecting the rest ofsdf
Fixes Issue(s)
-#2172 (additional PRs forthcoming)