db setup and teardown suite

setup/db/keyspace/CREATE.sql

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+CREATE KEYSPACE IF NOT EXISTS distributedunionfind WITH replication = {'class':'SimpleStrategy', 'replication_factor' : 3};

setup/db/keyspace/DROP.sql

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+DROP KEYSPACE IF EXISTS distributedunionfind

setup/db/keyspace/USE.sql

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+USE distributedunionfind;