[MNG-8340] IT

[cstamas]

Creates error message with beta-5 like:

[INFO] --- shade:3.5.0:shade (shade) @ child1 ---
[INFO] Including org.slf4j:slf4j-api:jar:2.0.16 in the shaded jar.
[INFO] Dependency-reduced POM written at: /home/cstamas/Worx/apache-maven/maven-integration-testing/core-it-suite/target/test-classes/mng-8340/child1/target/dr-pom.xml
[WARNING] The top project (/home/cstamas/Worx/apache-maven/maven-integration-testing/core-it-suite/target/test-classes/mng-8340/child1/target/dr-pom.xml) cannot be found in the reactor from root project (/home/cstamas/Worx/apache-maven/maven-integration-testing/pom.xml). Make sure the root directory is correct (a missing '.mvn' directory in the root project is the most common cause) and the project is correctly included in the reactor (missing activated profiles, command line options, etc.). For this build, the top project will be used as the root project.
[WARNING] The top project (/home/cstamas/Worx/apache-maven/maven-integration-testing/core-it-suite/target/test-classes/mng-8340/pom.xml) cannot be found in the reactor from root project (/home/cstamas/Worx/apache-maven/maven-integration-testing/pom.xml). Make sure the root directory is correct (a missing '.mvn' directory in the root project is the most common cause) and the project is correctly included in the reactor (missing activated profiles, command line options, etc.). For this build, the top project will be used as the root project.
[WARNING] child1-1.0.0.jar, slf4j-api-2.0.16.jar define 1 overlapping resource:
[WARNING]   - META-INF/MANIFEST.MF
[WARNING] maven-shade-plugin has detected that some files are
[WARNING] present in two or more JARs. When this happens, only one
[WARNING] single version of the file is copied to the uber jar.
[WARNING] Usually this is not harmful and you can skip these warnings,
[WARNING] otherwise try to manually exclude artifacts based on
[WARNING] mvn dependency:tree -Ddetail=true and the above output.
[WARNING] See https://maven.apache.org/plugins/maven-shade-plugin/
[INFO] Replacing original artifact with shaded artifact.
[INFO] Replacing /home/cstamas/Worx/apache-maven/maven-integration-testing/core-it-suite/target/test-classes/mng-8340/child1/target/child1-1.0.0.jar with /home/cstamas/Worx/apache-maven/maven-integration-testing/core-it-suite/target/test-classes/mng-8340/child1/target/child1-1.0.0-shaded.jar
[INFO] Copying org.apache.maven.it.mng8340:child1:pom:1.0.0 to project local repository
[INFO] Copying org.apache.maven.it.mng8340:child1:jar:1.0.0 to project local repository
[WARNING] Failed to notify spy org.apache.maven.ReactorReader$ReactorReaderSpy: 1 problem was  for org.apache.maven.it.mng8340:child1:jar:1.0.0
    - [FATAL] 'parent.relativePath' points at '../../pom.xml' but no POM could be found, please verify your project structure @ line 3, column 3

[cstamas]

So IT "works" with beta-5, FATAL message is there, but NPE fails with apache/maven#1857