[build] Use the Oxygen Recommended repo for Orbit

Change-Id: I3397bf25277e7b8ec795f0875cec57c710557a3c
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>
diff --git a/org.eclipse.gmf.notation.target/gmf-notation.target b/org.eclipse.gmf.notation.target/gmf-notation.target
index ae3728d..ac4f47a 100644
--- a/org.eclipse.gmf.notation.target/gmf-notation.target
+++ b/org.eclipse.gmf.notation.target/gmf-notation.target
@@ -19,7 +19,7 @@
 <unit id="org.hamcrest" version="1.1.0.v20090501071000"/>
 <unit id="org.hamcrest.text.source" version="1.1.0.v20090501071000"/>
 <unit id="org.hamcrest.text" version="1.1.0.v20090501071000"/>
-<repository location="http://download.eclipse.org/tools/orbit/downloads/drops/S20160916162009/repository/"/>
+<repository location="http://download.eclipse.org/tools/orbit/R-builds/R20170516192513/repository"/>
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.license.feature.group" version="1.0.1.v20140414-1359"/>