Splunk Connect for Kubernetes 1.4.0 release

Splunk Connect for Kubernetes 1.4.0 release.

This release also includes various bug fixes and improvements from community contributions, Thank You very much for all the contributions!!

Release Highlights

• Collect pod labels from kubernetes.
• Annotation features (index routing, blacklisting, sourcetype overwrite)
• All images are upgraded to Redhat UBI images
• Subcharts folder restructured
• Support using environment variable for HEC host address
• CI improvements
• Bug fixes

Breaking Changes

• SCK 1.4.0 will not work with any previous image tags than https://github.com/splunk/splunk-connect-for-kubernetes/blob/release/1.4.0/PLUGIN_VERSIONS.sh
• For logging, namespace index routing is deprecated. Please use annotation feature to control routing https://github.com/splunk/splunk-connect-for-kubernetes/tree/release/1.4.0#managing-sck-log-ingestion-by-using-annotations