Store a SHA256 hash of Netstorage Keys at ingest as a property

[ccloes]

PROBLEM: We would like a quick way to compare Netstorage Keys to valid ones in the graph using a hashing algorithm. The use case is to compare keys that may be in use against what is valid.

1. Identify which Netstorage keys can be stored in this way as a HASH value in a property
2. Update the ingest to include this HASH property.