No "gov.nasa.jpl.imce.oml.parent" artifact published.

[NicolasRouquette]

For changing versions using the Tycho versions plugin, it was necessary to edit the POM files such that every POM module P2 that is part of a parent POM P1 refers to P1 as its parent.
This results in a tree of POM modules & parent relationships.

However, as published, the root module refers to an unpublished parent module:

<project>
	<modelVersion>4.0.0</modelVersion>
	<groupId>gov.nasa.jpl.imce.oml</groupId>
	<artifactId>gov.nasa.jpl.imce.oml.root</artifactId>
	<version>0.9.6-SNAPSHOT</version>
	<packaging>pom</packaging>
	<parent>
		<groupId>gov.nasa.jpl.imce.oml</groupId>
		<artifactId>gov.nasa.jpl.imce.oml.parent</artifactId>
		<version>0.9.6-SNAPSHOT</version>
		<relativePath>./releng/gov.nasa.jpl.imce.oml.parent</relativePath>
	</parent>
	<modules>
		<module>plugins</module>
		<module>features</module>
		<module>tests</module>
		<module>releng</module>
	</modules>
</project>

This is because gov.nasa.jpl.imce.oml.parent is not directly or indirectly included as a module.