Improve log message in Delete CleanUp FATE. (#1829)

* Copied change over from 1.10
diff --git a/server/manager/src/main/java/org/apache/accumulo/manager/tableOps/delete/CleanUp.java b/server/manager/src/main/java/org/apache/accumulo/manager/tableOps/delete/CleanUp.java
index d74b71a..3022f4f 100644
--- a/server/manager/src/main/java/org/apache/accumulo/manager/tableOps/delete/CleanUp.java
+++ b/server/manager/src/main/java/org/apache/accumulo/manager/tableOps/delete/CleanUp.java
@@ -104,8 +104,8 @@
       if (!state.equals(TabletState.UNASSIGNED)) {
         // This code will even wait on tablets that are assigned to dead tablets servers. This is
         // intentional because the manager may make metadata writes for these tablets. See #587
-        log.debug("Still waiting for table to be deleted: " + tableId + " locationState: "
-            + locationState);
+        log.debug("Still waiting for table({}) to be deleted; Target tablet state: UNASSIGNED, "
+            + "Current tablet state: {}, locationState: {}", tableId, state, locationState);
         done = false;
         break;
       }