* Operability
* Added support for Redis Sentinel
* Added a new status code for Enrichment Failure in PanoptesPollingStatus
* Emit results from polling agent to message bus only if there are any results to emit
* Calculate plugin signatures without using configuration
* Check for Redis, Kafka and Zookeeper clients before attempting to delete them
* Set plugin execution timestamp to the start of the plugin execution cycle
* Try/catch errors related while trying to preload enrichments
* Handle UTF-8 while reading resource metadata key/values
* Prioritized merging of SNMP and x509 configuration options
* Scheduler
* Add support for running multiple schedulers for a given type of plugin - this allows scale-out of schedulers
* Read and sent in last_run_at in plugin schedulers allowing a newly started scheduler to pick up from where a previous one left
* Plugins
* Filter out zero temperature values for Juniper devices
* Filter out unusually high temperature values for Juniper devices
* Enrichments
* Define enrichment schemas (and their corresponding validators) for topology: PanoptesBridgeLookupEnrichmentGroup, PanoptesInverseInterfaceLookupEnrichmentGroup, PanoptesL3InterfaceLookupEnrichmentGroup
* Cleanup unused fields from PanoptesTopologyEnrichmentSchemaValidator
* Fixup field names in PanoptesDeviceLookupEnrichmentSchemaValidator
* Testing
* Increased unit test code coverage to 94% from 83%
* Build
* Deploy only on tags, which allows us to move to semantic package versioning
* Misc
* Raise NotImplementedError in PanoptesPollingPlugin's run method - this makes testing and verification easier
* Add transform_dotted_decimal_to_mac and convert_netmask_to_cidr as helper functions
* Add valid_panoptes_plugin_context, valid_resource and valid_kv_store_instance validators
* Use PanoptesValidators in asserts
* Use task context logger instead of context logger in discovery plugin agent
* Remove duplicate definition of PanoptesSNMPConnectionFactory
* Cleaned up comments and indentation