[Releng] build agains papyrus 2021-03

Change-Id: I42261aa876f501b548036602694cb88fe2b4dd32
Signed-off-by: Vincent Lorenzo <vincent.lorenzo@cea.fr>

releng-model2doc/targetplatform/org.eclipse.papyrus.model2doc.releng.main.targetplatform.target

 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="Papyrus-Model2Doc - 2021-03" sequenceNumber="1618581779">
+<target name="Papyrus-Model2Doc - 2021-03" sequenceNumber="1634907083">
   <locations>
     <location includeMode="planner" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="false" type="InstallableUnit">
       <unit id="org.eclipse.sdk.feature.group" version="4.19.0.v20210303-1800"/>
@@ -12,7 +12,7 @@
       <unit id="org.eclipse.papyrus.junit.framework" version="0.0.0"/>
       <unit id="org.eclipse.papyrus.sdk.feature.feature.group" version="0.0.0"/>
       <unit id="org.eclipse.papyrus.toolsmiths.feature.feature.group" version="0.0.0"/>
-      <repository id="Papyrus-2021-03" location="https://download.eclipse.org/modeling/mdt/papyrus/updates/nightly/master/"/>
+      <repository id="Papyrus-2021-03" location="https://download.eclipse.org/modeling/mdt/papyrus/updates/releases/2021-03/"/>
     </location>
     <location includeMode="planner" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="false" type="InstallableUnit">
       <unit id="org.eclipse.papyrus.sysml14.feature.feature.group" version="2.0.0.202011091859"/>

releng-model2doc/targetplatform/org.eclipse.papyrus.model2doc.releng.main.targetplatform.tpd

@@ -9,7 +9,7 @@ location "http://download.eclipse.org/releases/2021-03" eclipse-2021-03 {
 /** Manual dependencies */
 
 //manualUpdate
-location "https://download.eclipse.org/modeling/mdt/papyrus/updates/nightly/master/" Papyrus-2021-03 {
+location "https://download.eclipse.org/modeling/mdt/papyrus/updates/releases/2021-03/" Papyrus-2021-03 {
  org.eclipse.papyrus.junit.feature.feature.group lazy
  org.eclipse.papyrus.junit.framework lazy 
  org.eclipse.papyrus.sdk.feature.feature.group lazy