Illegal reflective access on Java 11

[pkunk]

Expected behavior

Support for Java >= 11 in 2.* and 3.* versions of ApplicationInsights. No warnings.

Actual behavior

Warning caused by shaded xstream dependency. x-stream/xstream#101

This issue is mitigated in xstream 1.4.13 and later, ApplicationInsights currently includes old 1.4.11.1 version.
See for more details:
x-stream/xstream#216
x-stream/xstream#218

To Reproduce

Steps to reproduce the behavior:

• clone project: https://github.com/pkunk/ai-reflection
• ./gradlew build

Sample Application

If applicable, provide a sample application which reproduces the issue.

System information

Please provide the following information:

• SDK Version: 2.6.2

Logs

Executing task 'build'...

Task :compileJava
Task :processResources UP-TO-DATE
Task :classes
Task :bootJar
Task :jar SKIPPED
Task :assemble
Task :compileTestJava
Task :processTestResources NO-SOURCE
Task :testClasses

Task :test
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.microsoft.applicationinsights.core.dependencies.xstream.core.util.Fields (file:/home/pkunk/.cache/gradle/modules-2/files-2.1/com.microsoft.azure/applicationinsights-web/2.6.2/689b4af8d82bd54d8ba694fff77c63ddaa89afc/applicationinsights-web-2.6.2.jar) to field java.util.TreeMap.comparator
WARNING: Please consider reporting this to the maintainers of com.microsoft.applicationinsights.core.dependencies.xstream.core.util.Fields
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

[trask]

Resolved by #1479