create a release script for updating versions

Component version can be found in poms so easily updated :

cd components-parents
mvn versions:set -DnewVersion=0.7.0-SNAPSHOT -DgenerateBackupPoms=false

• the root agregator pom needs to be updated
• the archetype pom must also be updated
  https://github.com/Talend/components/blob/master/components-api/src/main/resources/archetype-resources/pom.xml
• the paxexam options must also be updated
  https://github.com/Talend/components/blob/master/components-osgitest/src/test/java/org/talend/components/api/PaxExamOptions.java
• the component pom using properties need to be updated such as jira or splunk.

so an automatic script would be handy, But versions can be different so it would be nice to just remove the -SNAPSHOT without caring the version.