Remove deprecated

- Removal of deprecated stuff in filters: date, csv, json, kv, grep, grok, xml
- Removal of deprecated stuff in inputs: eventlog, gemfire, rabbitmq, sqs, 
- Removal of deprecated stuff in outputs: cloudwatch, elasticsearch_http, elasticsearch_river, gemfire, rabbitmq, sns, sqs, 
- Add support for multiple entries in a field for anonymize filter + test
- Removal of deprecated tests and modified a few.