Bug 571864: [build] add compressed artifacts to EASE p2 update sites

  update tycho version from copy script to 2.2.0 which supports that
  feature by default

Change-Id: I1b52b52dadea59985c843d3679c0185e5b79624a
diff --git a/releng/org.eclipse.ease.releng/hudson/publish-p2-pom.xml b/releng/org.eclipse.ease.releng/hudson/publish-p2-pom.xml
index 8531d96..5726f8d 100644
--- a/releng/org.eclipse.ease.releng/hudson/publish-p2-pom.xml
+++ b/releng/org.eclipse.ease.releng/hudson/publish-p2-pom.xml
@@ -8,7 +8,7 @@
 
 	<properties>
 		<!-- used plugin versions -->
-		<tycho.version>0.22.0</tycho.version>
+		<tycho.version>2.2.0</tycho.version>
 		<tycho.extras.version>${tycho.version}</tycho.extras.version>
 	</properties>