ReceivePack: Use Java 7 multi-catch for unpackError

Change-Id: I328f5952f23185a7d8f81a144979b4f8a095bd60

org.eclipse.jgit/src/org/eclipse/jgit/transport/ReceivePack.java

@@ -190,11 +190,7 @@ public class ReceivePack extends BaseReceivePack {
 			if (needPack()) {
 				try {
 					receivePackAndCheckConnectivity();
-				} catch (IOException err) {
+				} catch (IOException | RuntimeException | Error err) {
-					unpackError = err;
-				} catch (RuntimeException err) {
-					unpackError = err;
-				} catch (Error err) {
 					unpackError = err;
 				}
 			}