Merge pull request statsmodels#5213 from jbrockmendel/misplaced3

TST: Move misplaced duration test results files

Author: josef-pkt

statsmodels/duration/tests/phreg_gentests.py renamed to statsmodels/duration/tests/results/phreg_gentests.py

@@ -12,8 +12,8 @@
 #      with no events, entry times after censoring times, etc.
 
 # All the R results
-from . import survival_r_results
-from . import survival_enet_r_results
+from .results import survival_r_results
+from .results import survival_enet_r_results
 
 """
 Tests of PHReg against R coxph.