Update Apache parent pom to version 9
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Key: OPENNLP-190
URL: https://issues.apache.org/jira/browse/OPENNLP-190
Project: OpenNLP
Issue Type: Task
Components: Build, Packaging and Test
Reporter: Jörn Kottmann
Assignee: Jörn Kottmann
Priority: Minor
Fix For: tools-1.5.2-incubating, maxent-3.0.2-incubating
Lets update to the latest version (9) of the Apache parent pom.
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