mgmt: rename 'datas' to 'data' in FaceStatus and ForwarderStatus

Plural form of 'data' is 'data'.

refs #3955

Change-Id: I225a384c9a9ecf784f8cd55df19d391931619984
diff --git a/src/mgmt/nfd/face-status.hpp b/src/mgmt/nfd/face-status.hpp
index 32c2607..1051e65 100644
--- a/src/mgmt/nfd/face-status.hpp
+++ b/src/mgmt/nfd/face-status.hpp
@@ -87,13 +87,27 @@
   setNInInterests(uint64_t nInInterests);
 
   uint64_t
-  getNInDatas() const
+  getNInData() const
   {
     return m_nInData;
   }
 
+  DEPRECATED(
+  uint64_t
+  getNInDatas() const)
+  {
+    return getNInData();
+  }
+
   FaceStatus&
-  setNInDatas(uint64_t nInData);
+  setNInData(uint64_t nInData);
+
+  DEPRECATED(
+  FaceStatus&
+  setNInDatas(uint64_t nInData))
+  {
+    return setNInData(nInData);
+  }
 
   uint64_t
   getNInNacks() const
@@ -114,13 +128,27 @@
   setNOutInterests(uint64_t nOutInterests);
 
   uint64_t
-  getNOutDatas() const
+  getNOutData() const
   {
     return m_nOutData;
   }
 
+  DEPRECATED(
+  uint64_t
+  getNOutDatas() const)
+  {
+    return getNOutData();
+  }
+
   FaceStatus&
-  setNOutDatas(uint64_t nOutData);
+  setNOutData(uint64_t nOutData);
+
+  DEPRECATED(
+  FaceStatus&
+  setNOutDatas(uint64_t nOutData))
+  {
+    return setNOutData(nOutData);
+  }
 
   uint64_t
   getNOutNacks() const