Removed NatTable version requirements

The target no longer specifies exact bundle versions for NatTable
bundles.
Signed-off-by: Robert Smith <smithrw@ornl.gov>

org.eclipse.ice.target.neon/neon.target

@@ -160,12 +160,12 @@
 <repository location="http://bintray.com/artifact/download/pontesegger/ease-engines/"/>
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
-<unit id="org.eclipse.nebula.widgets.nattable.extension.poi.feature.feature.group" version="1.4.0.201606011907"/>
-<unit id="org.eclipse.nebula.widgets.nattable.core.feature.feature.group" version="1.4.0.201606011907"/>
-<unit id="org.eclipse.nebula.widgets.nattable.extension.glazedlists.feature.feature.group" version="1.4.0.201606011907"/>
-<unit id="org.eclipse.nebula.widgets.nattable.core.source.feature.feature.group" version="1.4.0.201606011907"/>
-<unit id="org.eclipse.nebula.widgets.nattable.extension.glazedlists.source.feature.feature.group" version="1.4.0.201606011907"/>
-<unit id="org.eclipse.nebula.widgets.nattable.extension.poi.source.feature.feature.group" version="1.4.0.201606011907"/>
+<unit id="org.eclipse.nebula.widgets.nattable.extension.poi.feature.feature.group" version="0.0.0"/>
+<unit id="org.eclipse.nebula.widgets.nattable.core.feature.feature.group" version="0.0.0"/>
+<unit id="org.eclipse.nebula.widgets.nattable.extension.glazedlists.feature.feature.group" version="0.0.0"/>
+<unit id="org.eclipse.nebula.widgets.nattable.core.source.feature.feature.group" version="0.0.0"/>
+<unit id="org.eclipse.nebula.widgets.nattable.extension.glazedlists.source.feature.feature.group" version="0.0.0"/>
+<unit id="org.eclipse.nebula.widgets.nattable.extension.poi.source.feature.feature.group" version="0.0.0"/>
 <repository location="http://download.eclipse.org/nattable/releases/1.4.0/repository"/>
 </location>
 </locations>