Added depreciation notice to PvlObject::addLogGroup for ISIS3 v9.0 (#5347)

* added depreciation notice to PvlObject::addLogGroup for ISIS v9.0

* added changelog notice for depreciation warning

* redirected warning output to cerr instead of cout

CHANGELOG.md

@@ -60,6 +60,7 @@ release.
 - Added new parameters <b>ONERROR</b>, <b>ERRORLOG</b>, and <b>ERRORLIST</b> to <i>mosrange</i> to provide better control over error behavior and provide diagnostics when problems are encountered processing the input file list.[#3606](https://github.com/DOI-USGS/ISIS3/issues/3606)
 - Added ability to delegate calculation of nadir pointing to ALE [#5117](https://github.com/USGS-Astrogeology/ISIS3/issues/5117)
 - Added --no-kernels flag to downloadIsisData [#5264](https://github.com/DOI-USGS/ISIS3/issues/5264)
+- Added notice for depreciation to PvlObject::addLogGroup function which will be depreciated in favor of Application::appendAndLog(https://github.com/DOI-USGS/ISIS3/issues/5310)
 
 ### Deprecated
 

isis/src/base/objs/PvlObject/PvlObject.cpp

@@ -159,6 +159,9 @@ namespace Isis {
   void PvlObject::addLogGroup(Isis::PvlGroup &group) {
     addGroup(group);
     Application::Log(group);
+    QString msg = "This function(PvlObject::addLogGroup) will be depreciated in ISIS3 v9.0 in "
+                  "favor of Application::appendLogGroup";
+    std::cerr << msg << std::endl;
   };
 
   /**