Groovy naturally supports many dynamic features that we don't benefit for now but cost performance loss, in this patch we compile our Groovy-based DSL scripts statically to optimize performance.

* Introduce trivy to scan images
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>

* Fix CVE
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>

* Update licenses
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>

* Remove log4j 1.x
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>

* Update CHANGES.md
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>

* Update LICENSE refer to webapp
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>
Co-authored-by: NZhenxu Ke <kezhenxu94@apache.org>

Add some defensive codes for NPE and bump up Kubernetes client version to expose exception stack trace (#6327)

* Update NOTICE

* Update NOTICE

* Update NOTICE

* Update elasticsearch client 7.0.0 to elasticsearch client 7.5.0.
* Update CHANGES.md and LICENSE.

The current implementation of envoy ALS K8S analysis is based on the hierarchy, pod -> StatefulSet -> deployment, StatefulSet, or others. It's freaky and different from the Istio Kubernetes registry.

The new path is pod -> endpoint -> service, and we should leverage Informer API instead of raw Kubernetes API.

* Upgrade dependencies and make the JDK11 compiling passed.

* Update license and fix license check file.

* Add CI for JDK11 compiling.

* Update doc.

* Support SSL for prometheus telemetry and prometheus fetcher
* Documents
* Clear up abandunt dependencies
* Update license
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>