Switch to Orbit I-build as per David Williams' suggestion

Change-Id: I5a527f7142fddd09b12c74797c7ab8821bbbb318
diff --git a/releng/org.eclipse.ecf.releng.bm/ecf.rmap b/releng/org.eclipse.ecf.releng.bm/ecf.rmap
index 8d07612..d860cad 100644
--- a/releng/org.eclipse.ecf.releng.bm/ecf.rmap
+++ b/releng/org.eclipse.ecf.releng.bm/ecf.rmap
@@ -138,7 +138,7 @@
     <rm:provider componentTypes="osgi.bundle" readerType="p2" source="false" mutable="false">
       <rm:property key="buckminster.source" value="false"/>
       <rm:property key="buckminster.mutable" value="false"/>
-      <rm:uri format="http://download.eclipse.org/tools/orbit/downloads/drops/S20151204220443/repository/"/>
+      <rm:uri format="http://download.eclipse.org/tools/orbit/downloads/drops/I20160209143415/repository/"/>
     </rm:provider>
 
     <rm:provider componentTypes="osgi.bundle" readerType="p2" source="false" mutable="false">