Merge pull request #3447 from jedwards4b/pio2_update

Pio2 update
Updates pio2 to the latest master (hash e41e6a652)
This change only affects nuopc driver where pio2 is default.

Test suite: SMS_D_Vnuopc.f09_g17.I2000Clm50SpGs.cheyenne_intel with pio_rearranger=1,2
Test baseline:
Test namelist changes:
Test status: bit for bit

Fixes ESCOMP/CTSM#940

User interface changes?:

Update gh-pages html (Y/N)?:

Code review:

config/cesm/machines/config_pio.xml

@@ -55,15 +55,13 @@
       <value mpilib="mpi-serial">netcdf</value>
     </values>
   </entry>
-
+<!--
   <entry id="PIO_REARRANGER">
     <values>
-      <!-- Note: problem not using box rearranger with nuopc caps -->
-      <!-- <value>$PIO_VERSION</value> -->
       <value>1</value>
     </values>
   </entry>
-
+-->
   <!--- uncomment and fill in relevant sections
   <entry id="PIO_DEBUG_LEVEL">
     <values>