[NRRPLT-0000] When building, run process_model before building nrpBackendProxy.

copy-to-storage.sh creates and populates the folders on which nrpBackendProxy's
update_template_models script works.

nrp_functions

@@ -325,6 +325,7 @@ function process_models {
 
   echo
   echo "Copying the models from Models to nrpStorage/TEMPLATE_MODELS"
+  # to be run before "npm run $HBP/nrpProxyBackend/update_template_models" (see nrpProxyBackend build)
   ./copy-to-storage.sh || { echo ERROR; exit 1; }
   }
 
@@ -365,6 +366,8 @@ function nrp_build {
 
   backup_storage
 
+  process_models  # to be run before nrpProxyBackend build
+
   if [ "$build_all" = "all" ]; then
     build_gazebo_dependencies
     build_gazebo
@@ -407,14 +410,13 @@ function nrp_build {
        grunt build || { echo GRUNT BUILD FAILED; exit 1; }
    fi
    if [ "$i" == "nrpBackendProxy" ]; then
-       npm run update_template_models
+       npm run update_template_models # to be run after $HBP/Models/copy-to-storage.sh (see process_models)
        npm run refactor_storage
    fi
    unset VENV_CMD
   done
 
   build_gzweb
-  process_models
   install_template_experiments_requirements
 }