Remove the maven.config file

[levivic]

Remove the maven.config file comes with maven 3.6 installation. This file disables the setting of $JAVA_HOME later in the container.

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• [ ] Pull Request title is properly formatted: [CLOUD-XYA] Subject
• [ ] Pull Request contains link to the JIRA issue
• [ ] Pull Request contains description of the issue
• [x] Pull Request does not include fixes for issues other than the main ticket
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• [x] Signed-off-by: Lei Zhang lzhan@redhat.com