Fix workflow generation post times for early cycle (#1329)

In PR #1309 a setting was overlooked that controls what hours have post tasks created for the early cycle.

Fixes #1328

workflow/rocoto/workflow_tasks.py

@@ -1276,7 +1276,7 @@ def _get_eposgroups(epos):
             fhmin = epos['FHMIN_ENKF']
             fhmax = epos['FHMAX_ENKF']
             fhout = epos['FHOUT_ENKF']
-            if self.cdump == "gfs":
+            if self.cdump == "enkfgfs":
                 fhmax = epos['FHMAX_ENKF_GFS']
                 fhout = epos['FHOUT_ENKF_GFS']
             fhrs = range(fhmin, fhmax + fhout, fhout)