Revert back to 30 seconds of sleep in tests ui after creating a custom config

tests/ui/Dockerfile

@@ -15,7 +15,7 @@ WORKDIR /opt/tests_ui
 
 COPY requirements.txt .
 
-RUN pip install --no-cache -r requirements.txt
+RUN MAKEFLAGS="-j $(nproc)" pip install --no-cache -r requirements.txt
 
 RUN touch test.txt && \
   zip test.zip test.txt && \

tests/ui/main.py

@@ -812,7 +812,7 @@ location /hello {
 
         assert_alert_message(driver, "was successfully created")
 
-        sleep(60)
+        sleep(30)
 
         driver.execute_script("window.open('http://www.example.com/hello','_blank');")
         driver.switch_to.window(driver.window_handles[1])