[WARNING] 
[WARNING] Some problems were encountered while building the effective model for org.jboss.tools.cdi.tests:org.jboss.tools.cdi.core.test:eclipse-test-plugin:1.6.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-clean-plugin is missing. @ line 376, column 12
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for org.jboss.tools.cdi.tests:org.jboss.tools.cdi.extension.core.test:eclipse-test-plugin:1.6.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-clean-plugin is missing. @ line 60, column 12
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for org.jboss.tools.cdi.tests:org.jboss.tools.cdi.deltaspike.core.test:eclipse-test-plugin:1.6.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-clean-plugin is missing. @ line 80, column 12
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]