mgmt+tools: rename 'datas' to 'data'

Plural form of 'data' is 'data'.

refs #3955

Change-Id: I62f5ebe53b8e36d565e5a243288eb12ae9a08014
diff --git a/tests/tools/nfdc/forwarder-general-module.t.cpp b/tests/tools/nfdc/forwarder-general-module.t.cpp
index ed026f2..688f9dd 100644
--- a/tests/tools/nfdc/forwarder-general-module.t.cpp
+++ b/tests/tools/nfdc/forwarder-general-module.t.cpp
@@ -59,7 +59,7 @@
   }
 
 private:
-  virtual void
+  void
   signDatasetReply(Data& data) override
   {
     m_keyChain.sign(data, ndn::security::signingByIdentity("/nfd-status/test-nfdid"));
@@ -81,12 +81,12 @@
     <packetCounters>
       <incomingPackets>
         <nInterests>20699052</nInterests>
-        <nDatas>5598070</nDatas>
+        <nData>5598070</nData>
         <nNacks>7230</nNacks>
       </incomingPackets>
       <outgoingPackets>
         <nInterests>36501092</nInterests>
-        <nDatas>5671942</nDatas>
+        <nData>5671942</nData>
         <nNacks>26762</nNacks>
       </outgoingPackets>
     </packetCounters>
@@ -107,8 +107,8 @@
             nCsEntries=65536
           nInInterests=20699052
          nOutInterests=36501092
-              nInDatas=5598070
-             nOutDatas=5671942
+               nInData=5598070
+              nOutData=5671942
               nInNacks=7230
              nOutNacks=26762
 )TEXT").substr(1);
@@ -126,10 +126,10 @@
          .setNMeasurementsEntries(1)
          .setNCsEntries(65536)
          .setNInInterests(20699052)
-         .setNInDatas(5598070)
+         .setNInData(5598070)
          .setNInNacks(7230)
          .setNOutInterests(36501092)
-         .setNOutDatas(5671942)
+         .setNOutData(5671942)
          .setNOutNacks(26762);
   this->sendDataset("/localhost/nfd/status/general", payload);
   this->prepareStatusOutput();