Fixed a bug in DataManWriter which uses a wrong engine name

Copyright.txt

@@ -20,6 +20,7 @@ The following individuals and institutions are among the Contributors:
 * Greg S. Eisenhauer <eisen@cc.gatech.edu> 
 * William F. Goody <godoywf@ornl.gov>
 * Norbert Podhorszki <pnorbert@ornl.gov>
+* Ruonan (Jason) Wang <wangr1@ornl.gov>
 
 See version control history for details of individual contributions.
 

examples/hello/datamanWriter/helloDataManWriter.cpp

@@ -46,7 +46,7 @@ int main(int argc, char *argv[])
         if (!datamanSettings.isUserDefined())
         {
             // if not defined by user, we can change the default settings
-            datamanSettings.SetEngine("DatamanWriter");
+            datamanSettings.SetEngine("DataManWriter");
             datamanSettings.SetParameters("peer-to-peer=yes", "real_time=yes",
                                           "compress=no");
             datamanSettings.AddTransport("Mdtm", "localIP=128.0.0.0.1",