Update analysis output files

    have compass expect seperate files for the dome and rmse convergence.

Author: andrewdnolan

compass/landice/tests/mesh_convergence/halfar/analysis.py

@@ -26,7 +26,8 @@ def __init__(self, test_case, resolutions):
         """
         super().__init__(test_case=test_case, resolutions=resolutions)
         self.resolutions = resolutions
-        self.add_output_file('convergence.png')
+        self.add_output_file('convergence_rmse.png')
+        self.add_output_file('convergence_dome.png')
 
     def run(self):
         """