Fix DRS for IPSLCM : split attribute 'freq' into : 'out' and 'freq' (#…

…1304)

Instead of writing e.g. :
      out: Analyse/TS_MO'
    one should no write :
      out: Analyse, freq: TS_MO

    This in mainly order to avoid side effects when creating output
    directories based on attributes value

doc/develop/fixing_data.rst

@@ -381,10 +381,10 @@ formats) are supported, and should be configured in recipes as e.g.:
 .. code-block:: yaml
 
   datasets:
-    - {simulation: CM61-LR-hist-03.1950, exp: piControl, freq: Analyse/TS_MO,
+    - {simulation: CM61-LR-hist-03.1950, exp: piControl, out: Analyse, freq: TS_MO,
        account: p86caub,  status: PROD, dataset: IPSL-CM6, project: IPSLCM,
        root: /thredds/tgcc/store}
-    - {simulation: CM61-LR-hist-03.1950, exp: historical, freq: Output/MO,
+    - {simulation: CM61-LR-hist-03.1950, exp: historical, out: Output, freq: MO,
        account: p86caub,  status: PROD, dataset: IPSL-CM6, project: IPSLCM,
        root: /thredds/tgcc/store}
 

esmvalcore/config-developer.yml

@@ -139,7 +139,7 @@ CORDEX:
 IPSLCM:
   cmor_strict: false
   input_dir:
-    default: '{root}/{account}/{model}/{status}/{exp}/{simulation}/{dir}/{freq}'
+    default: '{root}/{account}/{model}/{status}/{exp}/{simulation}/{dir}/{out}/{freq}'
   input_file:
     default:
       - '{simulation}_*_{ipsl_varname}.nc'