Merge pull request #1277 from victorusu/test/streamtest

[test] Enable units in StreamTest when running with an unknown programming environment

Author: Vasileios Karakasis

cscs-checks/microbenchmarks/stream/stream.py

@@ -125,7 +125,7 @@ def prepare_test(self):
         try:
             self.reference = self.stream_bw_reference[envname]
         except KeyError:
-            pass
+            self.reference = self.stream_bw_reference['PrgEnv-gnu']
 
     @rfm.run_before('compile')
     def cray_linker_workaround(self):