Merge branch 'yinghuilu/cice/fix952' (PR #1196)

Fix PIO error in CICE

Time stamp in components/cice/src/drivers/cpl/ice_history_write.F90
was not synchronized across processors. This can lead to PIO error
"File header is inconsistent among processes" on occasions.
This PR broadcast the time stamp from masterproc to other processors
to fix the issue. (issue #952)

Fixes #952
Fixes #1198

[BFB]

components/cice/src/drivers/cpl/ice_history_write.F90

@@ -459,16 +459,16 @@ subroutine icecdf(ns)
       title = 'CF-1.0'
       status =  &
            pio_put_att(File,pio_global,'conventions',title)
-
+      if (my_task == master_task) then
       call date_and_time(date=current_date, time=current_time)
-      write(start_time,1000) current_date(1:4), current_date(5:6), &
+        write(start_time,1000) current_date(1:4), current_date(5:6), &
            current_date(7:8), current_time(1:2), &
            current_time(3:4)
-1000  format('This dataset was created on ', &
+1000    format('This dataset was created on ', &
            a,'-',a,'-',a,' at ',a,':',a)
-
+      end if
+      call broadcast_scalar(start_time, my_task)
       status = pio_put_att(File,pio_global,'history',start_time)
-
       !-----------------------------------------------------------------
       ! end define mode
       !-----------------------------------------------------------------