Don't swallow JSchException "Auth fail" exception

"Auth fail" exception was swallowed during retrying, this leads to
"Session down" exception during clone operation with invalid SSH keys.

Bug: 336795
Change-Id: Id8d9e83b10f4f2a01e0cf89819190bb23a04a2b9
Signed-off-by: Dariusz Luksza <dariusz@luksza.org>

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

@@ -120,7 +120,8 @@ public abstract class JschConfigSessionFactory extends SshSessionFactory {
 					// if authentication failed maybe credentials changed at the
 					// remote end therefore reset credentials and retry
 					if (credentialsProvider != null && e.getCause() == null
-							&& e.getMessage().equals("Auth fail")) {
+							&& e.getMessage().equals("Auth fail")
+							&& retries < 3) {
 						credentialsProvider.reset(uri);
 						session = createSession(credentialsProvider, fs, user,
 								pass, host, port, hc);