KAFKA-10592: Fix vagrant for a system tests with python3

Fix vagrant for a system tests with a python3.

Author: Nikolay Izhikov <nizhikov@apache.org>

Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>

Closes #9480 from nizhikov/KAFKA-10592

tests/README.md

@@ -404,9 +404,9 @@ https://cwiki.apache.org/confluence/display/KAFKA/tutorial+-+set+up+and+run+Kafk
 * Install system test dependencies, including ducktape, a command-line tool and library for testing distributed systems. We recommend to use virtual env for system test development
 
         $ cd kafka/tests
-        $ virtualenv venv
+        $ virtualenv -p python3 venv
         $ . ./venv/bin/activate
-        $ python setup.py develop
+        $ python3 setup.py develop
         $ cd ..  # back to base kafka directory
 
 * Run the bootstrap script to set up Vagrant for testing
@@ -482,7 +482,7 @@ the test driver machine.
 
 * Start by making sure you're up to date, and install git and ducktape:
 
-        $ sudo apt-get update && sudo apt-get -y upgrade && sudo apt-get install -y python-pip git
+        $ sudo apt-get update && sudo apt-get -y upgrade && sudo apt-get install -y python3-pip git
         $ pip install ducktape
 
 * Get Kafka:
@@ -548,7 +548,7 @@ Where are the unit tests?
 
 How do I run the unit tests?
 * cd kafka/tests # The base system test directory
-* python setup.py test
+* python3 setup.py test
 
 How can I add a unit test?
 * Follow the naming conventions - module name starts with "check", class name begins with "Check", test method name begins with "check"

tests/setup.py

@@ -51,7 +51,7 @@ setup(name="kafkatest",
       license="apache2.0",
       packages=find_packages(),
       include_package_data=True,
-      install_requires=["ducktape==0.7.9", "requests==2.22.0"],
+      install_requires=["ducktape==0.8.0", "requests==2.24.0"],
       tests_require=["pytest", "mock"],
       cmdclass={'test': PyTest},
       )