Add ability to use 3rd party plugin functions in acceptance tests

All plugins that we keep active during acceptance tests bootstrap are then loaded
by WP Browser extension and that gives us ability to use their functions and classes
within the acceptance tests.
[MAILPOET-3471]

tests/docker/codeception/docker-entrypoint.sh

@@ -59,7 +59,7 @@ if [[ $CIRCLE_JOB == *"_latest" ]]; then
   WOOCOMMERCE_VERSION="latest"
 fi
 
-# install WooCommerce (activate & deactivate it to populate DB for backup)
+# install WooCommerce
 if [[ ! -d "/wp-core/wp-content/plugins/woocommerce" ]]; then
   cd /wp-core/wp-content/plugins
   WOOCOMMERCE_SOURCE_ZIP="/wp-core/wp-content/plugins/mailpoet/tools/vendor/woocommerce.zip"
@@ -80,8 +80,6 @@ if [[ ! -d "/wp-core/wp-content/plugins/woocommerce" ]]; then
   echo "Unzip Woocommerce plugin from $WOOCOMMERCE_TARGET_ZIP"
   unzip -q -o "$WOOCOMMERCE_TARGET_ZIP"
 fi
-wp plugin activate woocommerce
-wp plugin deactivate woocommerce
 
 # Install WooCommerce Subscriptions
 if [[ ! -d "/wp-core/wp-content/plugins/woocommerce-subscriptions" ]]; then
@@ -96,6 +94,10 @@ if [[ ! -d "/wp-core/wp-content/plugins/woocommerce-subscriptions" ]]; then
   unzip -q -o "$WOOCOMMERCE_SUBS_ZIP" -d /wp-core/wp-content/plugins/
 fi
 
+# activate all plugins which source code want to access in tests runtime
+wp plugin activate woocommerce
+wp plugin activate woocommerce-subscriptions
+
 # add configuration
 CONFIG=''
 CONFIG+="define('WP_DEBUG', true);\n"