wait until renderer is initialized too before registrar test

testing/preprocessor_test.sh

 #!/bin/bash
 product_list_file=$1
+echo "Starting preprocessor test"
 
 while read product; do
     echo $product

testing/registrar_test.sh

 #!/bin/bash
 product_list_file=$1
-echo "inside registrar_test"
+echo "Starting registrar test"
 
 OS_PASSWORD=$(docker exec -i $(docker ps -qf "name=emg-pvs_registrar") cat /run/secrets/OS_PASSWORD)
 
 IFS=","
 docker exec -i $(docker ps -qf "name=emg-pvs_registrar") /wait-initialized.sh
+docker exec -i $(docker ps -qf "name=emg-pvs_renderer") /wait-initialized.sh
 while read product; do
     docker exec -e OS_PASSWORD=$OS_PASSWORD -i $(docker ps -qf "name=emg-pvs_registrar") \
          python3 /registrar.py \