Fix conflcting Birt features versions in our Repository

Using repository http://download.jboss.org/jbosstools/updates/target-platform_3.3.indigo.SR1-M/latest/

trunk/birt$ mvn install -Dmaven.test.skip=true -DskipTests=true -DtychoVersion=0.14.0-SNAPSHOT
...
[ERROR] Cannot resolve project dependencies:
[ERROR] Software being installed: org.jboss.tools.birt.feature.feature.group
1.3.0.qualifier
[ERROR] Only one of the following can be installed at once:
[org.eclipse.birt.chart.ui 3.7.1.v20110905, org.eclipse.birt.chart.ui
3.7.2.v20120130]
[ERROR] Cannot satisfy dependency: org.eclipse.birt.chart.feature.group
3.7.1.v20110905-7r9e7DFQCnvKN75--lXE5 depends on: org.eclipse.birt.chart.ui
[3.7.1.v20110905]
[ERROR] Cannot satisfy dependency: org.eclipse.birt.feature.group
3.7.2.v20120130-BDF9E9bGTzuHh02eP-27WvmBpq8k depends on:
org.eclipse.birt.chart.ui [3.7.2.v20120130]
[ERROR] Cannot satisfy dependency: org.jboss.tools.birt.feature.feature.group
1.3.0.qualifier depends on: org.eclipse.birt.chart.feature.group 2.5.0
[ERROR] Cannot satisfy dependency: org.jboss.tools.birt.feature.feature.group
1.3.0.qualifier depends on: org.eclipse.birt.feature.group 2.5.0