TestNG test suites are instable with current master branch

[dstenger]

Describe the bug
When a TestNG test suite (e.g. ets-ogcapi-features10) is put into the same tomcat as the deps artifact of ets-kml22 (https://search.maven.org/remotecontent?filepath=org/opengis/cite/ets-kml22/1.14/ets-kml22-1.14-deps.zip), the execution of the TestNG test suite fails with error:

Error in call to extension function {public java.lang.Object com.occamlab.te.TECore.callFunction(net.sf.saxon.expr.XPathContext,java.lang.String,java.lang.String,net.sf.saxon.om.NodeInfo) throws java.lang.Exception}: Exception in extension function net.sf.saxon.s9api.SaxonApiException: Error in call to extension function {public javax.xml.transform.Source org.opengis.cite.ogcapifeatures10.TestNGController.doTestRun(org.w3c.dom.Document) throws java.lang.Exception}: Exception in extension function java.util.ServiceConfigurationError: org.testng.ITestNGListener: Provider com.occamlab.te.spi.executors.testng.EarlReporter could not be instantiated

This error did not occur with TEAM Engine v5.4.1.

To Reproduce
Steps to reproduce the behavior:

1. https://github.com/opengeospatial/teamengine-docker project can be used to easily reproduce the error.
2. Build TEAM Engine v5.5-SNAPSHOT locally.
3. Add v5.5-SNAPSHOT to pom file of teamengine-docker project.
4. Build and start TEAM Engine: mvn clean install && docker run --rm -p 8081:8080 --name beta ogccite/teamengine-beta
5. TEAM Engine can be accessed via http://localhost:8081/te2/.
6. Error can be reproduced by running ets-ogcapi-features10.
7. Remove ets-kml22 dependency from teamengine-docker project.
8. Error does not occur anymore when running ets-ogcapi-features10.

Expected behavior
It should be analyzed why this error is occurring now and was not occurring previously (v5.4.1).
Afterwards, a fix either in TEAM Engine or ets-kml22 shall be implemented.

[bpross-52n]

The reason for this is the slf4j-log4j12-1.7.6.jar library.

[dstenger]

I can confirm that removing dependency slf4j-log4j12-1.7.6.jar solves the problem described in this issue.
Also ets-kml22 is still working.

Issue was created in ets-kml22 repository: opengeospatial/ets-kml22#30

[dstenger]

@bpross-52n Could you please provide some more details why this library is breaking TEAM Engine?
Afterwards, the issue can be closed.

[bpross-52n]

With Teamengine 5.5-SNAPSHOT, there is a ClassNotFoundException: org.apache.log4j.Level. With Teamengine 5.4.1 another library is present: slf4j-jdk14-1.7.21.jar. This contains an implementation of the org.apache.log4j.Level.