Revert acccord module to absolute path

.gitmodules

@@ -1,4 +1,4 @@
 [submodule "modules/accord"]
 	path = modules/accord
-	url = ../cassandra-accord.git
+	url = https://github.com/apache/cassandra-accord.git
 	branch = trunk

src/java/org/apache/cassandra/tcm/Retry.java

@@ -27,6 +27,7 @@ import org.apache.cassandra.config.DatabaseDescriptor;
 import org.apache.cassandra.utils.Clock;
 
 import static com.google.common.util.concurrent.Uninterruptibles.sleepUninterruptibly;
+import static org.apache.cassandra.tcm.Retry.Jitter.MAX_JITTER_MS;
 
 public abstract class Retry
 {
@@ -160,6 +161,35 @@ public abstract class Retry
             return new Deadline(Clock.Global.nanoTime() + timeoutNanos, delegate);
         }
 
+        /**
+         * Since we are using message expiration for communicating timeouts to CMS nodes, we have to be careful not
+         * to overflow the long, since messaging is using only 32 bits for deadlines. To achieve that, we are
+         * giving `timeoutNanos` every time we retry, but will retry indefinitely.
+         */
+        public static Deadline retryIndefinitely(long timeoutNanos, Meter retryMeter)
+        {
+            return new Deadline(Clock.Global.nanoTime() + timeoutNanos,
+                    new Retry.Jitter(Integer.MAX_VALUE, MAX_JITTER_MS, new Random(), retryMeter))
+            {
+                @Override
+                public boolean reachedMax()
+                {
+                    return false;
+                }
+
+                @Override
+                public long remainingNanos()
+                {
+                    return timeoutNanos;
+                }
+
+                public String toString()
+                {
+                    return String.format("RetryIndefinitely{tries=%d}", currentTries());
+                }
+            };
+        }
+
         @Override
         public boolean reachedMax()
         {