Update AQL Queries to work with Clustered ArangoDB Deploys

[1nv8rzim]

When using a clustered ArangoDB deploy you need to manually set the collections that you will be accessing as they can be sharded against dbservers. To do with you just need to add WITH [collection] at the beginning of the queries for any cross-collection queries.

Example Error:

File "/app/plugins/feeds/public/abusech_malwarebazaar.py", line 117, in analyze malware_file.link_to(sha256_data, "sha256", self.name)
File "/app/core/database_arango.py", line 483, in link_to neighbors = list(self._db.aql.execute(aql, bind_vars=args))
 [TRUNCATED UNIMPORTANT PART]
arango.exceptions.AQLQueryExecuteError: [HTTP 400][ERR 1521] AQL: collection not known to traversal: 'observables'. please add  'WITH observables' as the first line in your AQL (while executing)