VOL-3503 Add a device operational state of RECONCILING

Change-Id: I90fa70157e583b6bc950fc82c7f86be665d4c8fe
diff --git a/protos/voltha_protos/common.proto b/protos/voltha_protos/common.proto
index 25700f9..85d3597 100644
--- a/protos/voltha_protos/common.proto
+++ b/protos/voltha_protos/common.proto
@@ -63,6 +63,9 @@
 
         // The device has failed and cannot fulfill its intended role
         FAILED = 5;
+
+        // The device is reconciling
+        RECONCILING = 6;
     }
 }