Add FLU Read and Search permissions for MAVIS. (#881)

Author: mfjarvis

config/prod/permissions_config.json

@@ -30,7 +30,7 @@
   {
     "supplier": "MAVIS",
     "permissions": [
-      "FLU.CUD",
+      "FLU.CRUDS",
       "HPV.CUD"
     ],
     "ods_codes": ["V0V8L"]