[493903] Runtime Server wizard does not refresh on Auto/Manual refresh
of Downloadable adapter list

Change-Id: I39009065963759635e14162f022a604a76f56320
diff --git a/plugins/org.eclipse.wst.server.core/servercore/org/eclipse/wst/server/core/ServerCore.java b/plugins/org.eclipse.wst.server.core/servercore/org/eclipse/wst/server/core/ServerCore.java
index 3bf436f..7a3a1f9 100644
--- a/plugins/org.eclipse.wst.server.core/servercore/org/eclipse/wst/server/core/ServerCore.java
+++ b/plugins/org.eclipse.wst.server.core/servercore/org/eclipse/wst/server/core/ServerCore.java
@@ -188,6 +188,7 @@
 	 */
 	public static void resetDownloadableServers(){
 		DAServerTypes = null;
+		DARuntimeTypes = null;
 	}
 	
 	/**