added another repository to get apache collections4
diff --git a/org.eclipse.stem/releng/org.eclipse.stem.tycho.configuration/pom.xml b/org.eclipse.stem/releng/org.eclipse.stem.tycho.configuration/pom.xml
index 8bfd22f..eda6602 100755
--- a/org.eclipse.stem/releng/org.eclipse.stem.tycho.configuration/pom.xml
+++ b/org.eclipse.stem/releng/org.eclipse.stem.tycho.configuration/pom.xml
@@ -19,12 +19,16 @@
<layout>p2</layout>
</repository>
<repository>
- <id>Xtext</id>
+ <id>BIRT</id>
<url>http://download.eclipse.org/releases/2019-09/</url>
<layout>p2</layout>
</repository>
<repository>
-
+ <id>Utils</id>
+ <url>https://download.eclipse.org/tools/orbit/downloads/drops2/S20210216215844/repository/</url>
+ <layout>p2</layout>
+ </repository>
+ <repository>
<id>STEMData</id>
<url>http://download.eclipse.org/stem/update-site/data/</url>
<layout>p2</layout>
