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

* [maven-release-plugin] prepare release v8.4.0

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* [maven-release-plugin] prepare release v8.3.0

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* Include SAN to set mTLS property
* Fix codes as SAN is a list.
* Update the changelog.
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>
Co-authored-by: Wu Sheng <wu.sheng@foxmail.com>

* Support nested sidecar object in the scope.

* Update the changelog.

* Fix comments and docs.

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.

* [maven-release-plugin] prepare release v8.2.0

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* Upgrade dependencies and make the JDK11 compiling passed.

* Update license and fix license check file.

* Add CI for JDK11 compiling.

* Update doc.

* Parse tls mode from als
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>

* Polish code
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>

* [maven-release-plugin] prepare release v8.1.0

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* [maven-release-plugin] prepare release v8.0.0

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* Remove all shardingsphere cases.

* Split the official_analysis.oal into different parts

* Add Envoy OAL define.

* Fix license.

* Set up restrict length rules for service, instance and endpoint

* Adjust two env names.

Here are the list of changes we made in this pull request. Top 3 are the principle changes, others are following these principles.
1. New agent and mesh report protocol. 
2. New agent header protocol. 
3. Service register, instance register and network address register have been removed permanently.
4. Service traffic, instance traffic and network alias metrics are added to replace the service, instance and network address inventory.
5. Register process has been removed.
6. Metrics stream process supports insert only mode, especially for traffic entities.
7. Metrics stream process supports no-downsampling mode for traffic entities and network alias.
8. Remove all register mechanism and cache in the java agent.
9. Remove MONTH step in GraphQL query.
10. Update UI to remove MONTH step query, the max query range is 60 days now.
11. Simplify the TTL to metrics and record. And the unit has been formatted in Day unit. No specific TTL for ElasticSearch storage.
12. Buffer mechanism of trace receiver and mesh receiver has been removed due to no register.
13. New service id, instance id and endpoint id rules, including service relation, instance relation and endpoint relation id rules.
14. Java agent support `keep tracing` mode, meaning, agent generating tracing context even the backend is unconnected/unavailable.
15. Plugin test tool up to date, in order to support new protocol.
16. Plugin tests expected data files updated.
17. E2E tests updated.
18. Telemetry of Grafana config has been merged into one.
19. Documentation updates.
20. [TBD] InfluxDB storage implementation is not available, need @dmsolr to fix later, in order to reduce the master change block by this PR.

* [maven-release-plugin] prepare release v7.0.0

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Motivation:

Review code styles with some bots automatically.

Modifications:

Set up ReviewDog in GitHub Action to review code style.

Add more check rules to checkstyle plugin.

Result:

Obvious code styles can be reviewed and commented automatically.

* Update JDK compiling level to 8, and remove zip dist.

* Exclude annotation and shade API.

* Fix more exclusion.

* 1. Update grava and gson 2. Fix compile issue. 3. Keep protoc and maven plugin in old version. Some incompatible of 3rd party grpc proto.

* Fix dependency conflicts, license and notice issue, and dependency check script issue
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>

* [maven-release-plugin] prepare release v6.6.0

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* [maven-release-plugin] prepare release v6.5.0

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* [maven-release-plugin] prepare release v6.4.0

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* [maven-release-plugin] prepare release v6.2.0

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* fix potential NullPointerException

* Revert "fix potential NullPointerException"

This reverts commit 8393656

* fix potential NullPointerException
the static paramater is best to use the class to reference

* Filtering pods not in 'Running' phase

* Amending checkstyle errors