Grammar fixes for util.cpp

Change-Id: If9b52187610651afc9d800bf6f5f3b81b1f1df19
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/util.cpp b/util.cpp
index 679b2cb..8f3aabb 100644
--- a/util.cpp
+++ b/util.cpp
@@ -482,7 +482,7 @@
         elog<InternalFailure>();
     }
 
-    // It is expected that only one object have impelmented this interface.
+    // It is expected that only one object has implemented this interface.
 
     auto objPath = objectTree.begin()->first;
     auto service = objectTree.begin()->second.begin()->first;