Initial commit for a multi-tenant configuration

This PR adds (basic / Cloud Foundry specific) multi-tenant support.  

Specifically:

1. A new ingestor port can be defined for each CF org/space ([`cf.tenants` manifest setting](https://github.com/logsearch/logsearch-boshrelease/pull/77/files#diff-4ae895efb1f961b6fe8fa8807f404d07R49))
2. The ingestor forwards logs to a [tenant specific queue](https://github.com/logsearch/logsearch-boshrelease/pull/77/files#diff-16adfeea7c6ab604aa7c99f7365bb942R76)
3. The log_parsers pull off each tenant specific queue, and parse using standard filters, and then forward to a tenant specific elasticsearch index - [`index => "logstash-%{tenant}-%{+YYYY.MM.dd}"`](https://github.com/logsearch/logsearch-boshrelease/pull/77/files#diff-71406092a7ed9f19647f893d34cc6892R29)
4. The log parsers include set of (manually configured) [CF Application GUID to Tenant Mappings](https://github.com/logsearch/logsearch-boshrelease/pull/77/files#diff-aae6cc83e85bc7ba404288312173f3e2R2)
5. A set of [standard kibana dashboards is added to the kibana embedded in elasticsearch](https://github.com/logsearch/logsearch-boshrelease/pull/77/files#diff-2de0d04be3cc14378e96040b44546d3cR10)
6.  When the elasticsearch job starts, it [creates a set of dashboards for each configured tenant](https://github.com/logsearch/logsearch-boshrelease/pull/77/files#diff-df08e431dda0ea301e3e3081a57ec33dR27)
7.  The [syslog_drains BOSH errand](https://github.com/logsearch/logsearch-boshrelease/pull/77/files#diff-61b8448ee67c5c838b3bc4859a6d8328R2) can be used to add a set of CF syslog drains for the configured `cf.tenants`
8.  A set of vsphere deployment manifest samples are included
Once a field has been added, it's persisted for the remainder of the event's life, so it should automatically be passed to redis. Assuming the field is already set, this is basically just re-setting the field to itself (or, literally `%{tenant}` if it didn't come from a tenant). I think the line can/should be removed unless I'm still missing something and in testing you required it.