Work on *.core.importmodel.common plug-in.

Replace locationURI of the menu contribution.

Change-Id: I7fc64953c263a89c428de5850356485bfef569c4
diff --git a/core/importmodel/org.polarsys.esf.core.importmodel.common/plugin.xml b/core/importmodel/org.polarsys.esf.core.importmodel.common/plugin.xml
index 887126f..25efeaf 100644
--- a/core/importmodel/org.polarsys.esf.core.importmodel.common/plugin.xml
+++ b/core/importmodel/org.polarsys.esf.core.importmodel.common/plugin.xml
@@ -37,7 +37,8 @@
    <extension
          point="org.eclipse.ui.menus">
       <menuContribution
-            locationURI="popup:org.eclipse.papyrus.views.modelexplorer.modelexplorer.popup?after=tools">
+            allPopups="false"
+            locationURI="popup:org.eclipse.papyrus.views.modelexplorer.modelexplorer.popup">
          <menu
                icon="platform:/plugin/org.polarsys.esf.core.resources.graphical/src/main/resources/icons/logos/icon_esf_16x16.png"
                id="org.polarsys.esf.core.importmodel.menu"