This way too large commit introduces various features: Pillar 2.0, replicationFactor, test configs, vesion bumo

- Upgrade to pillar 2.0.0
- Added cassandra.replicationFactor config option to allow configuring different replication factors than 3. This is used in testing if one runs against a single node.
- Added the Tasks and Config entries to the Test and Default configuration so one can provide different config for testing and "normale" usage
- Auto "USE keyspace" after Pillar.initialize to select the proper keyspace. Could be fixed with https://github.com/comeara/pillar/issues/16
- Version bump to 1.0.0 as it is used in production now