sanity.external tomee test failure (gradle plugin access issue)

[smlambert]

Describe the bug
Believe this an upstream bug, where tomee test suite is trying to fetch test artifacts from http versus https - need to check if we can update which version of tomee we are running to use a version that resolves this issue.

[2020-04-15T12:59:19.712Z] [ERROR] Failed to execute goal on project gradle: Could not resolve dependencies for project org.apache.tomee.gradle:gradle:pom:8.0.0: Failed to collect dependencies at org.gradle:gradle-core:jar:3.0: Failed to read artifact descriptor for org.gradle:gradle-core:jar:3.0: Could not transfer artifact org.gradle:gradle-core:pom:3.0 from/to gradle-libs-releases-local (http://repo.gradle.org/gradle/libs-releases-local/): Access denied to: http://repo.gradle.org/gradle/libs-releases-local/org/gradle/gradle-core/3.0/gradle-core-3.0.pom , ReasonPhrase:Forbidden. -> [Help 1]

To Reproduce
Steps to reproduce the behavior (or Grinder rerun link):
https://ci.adoptopenjdk.net//job/Grinder/parambuild/?JDK_VERSION=8&JDK_IMPL=hotspot&BUILD_LIST=external/tomee&PLATFORM=x86-64_linux&TARGET=sanity.external&SDK_RESOURCE=nightly

Expected behavior
All tomee tests execute and pass.

Additional context
Previously mentioned here: #1567 (comment)

[smlambert]

Close in favour of epic #2057