parent/pom.xml artifacts not picking the versions of artifacts correctly due to errors in that pom

[ratnajothy]

Description:
Errors related to versions in parent/pom.xml

• Version of poi-ooxml artifact is not picked correctly.
• Incorrect version property referenced for xmlunit artifact.

Suggestions:

• Include the defined version property orbit.version.poi.ooxml within ${} for poi-ooxml artifact, as it is missing.
• Reference the right version property for xmlunit artifact.

Affected Product Version:

• carbon-parent artifact referenced in all 4.x.x of the versions carbon-kernel are affected.

Steps to reproduce:

1. Implement a custom provisioning.listener and use the parent as follows,

<parent>
   <groupId>org.wso2.carbon</groupId>
   <artifactId>carbon-kernel</artifactId>
   <version>4.x.x</version>
</parent>

2. mvn clean install fails stating the following error as it could not resolve the dependency.

Could not find artifact org.wso2.orbit.org.apache.poi:poi-ooxml:jar:orbit.version.poi.ooxml ....