Plugin goals are not marked @threadSafe to support parallel building

[simontunnat]

I get the following warning message when I run my AEM Maven project with multiple threads:

[INFO] --------------------------[ content-package ]---------------------------
[WARNING] *****************************************************************
[WARNING] * Your build is requesting parallel execution, but project      *
[WARNING] * contains the following plugin(s) that have goals not marked   *
[WARNING] * as @threadSafe to support parallel building.                  *
[WARNING] * While this /may/ work fine, please look for plugin updates    *
[WARNING] * and/or request plugins be made thread-safe.                   *
[WARNING] * If reporting an issue, report it against the plugin in        *
[WARNING] * question, not against maven-core                              *
[WARNING] *****************************************************************
[WARNING] The following plugins are not marked @threadSafe in de.viega.web.aem:viega-aem-package:
[WARNING] com.day.jcr.vault:content-package-maven-plugin:0.5.1
[WARNING] com.citytechinc.cq.cq-component-plugin:cq-component-maven-plugin:7.0.0
[WARNING] Enable debug to see more precisely which goals are not marked @threadSafe.
[WARNING] *****************************************************************

Maven command:
mvn clean verify -T 4