Update ansible-test sanity command. (#31958)

* Use correct pip version in ansible-test.
* Add git fallback for validate-modules.
* Run sanity tests in a docker container.
* Use correct python version for sanity tests.
* Pin docker completion images and add default.
* Split pylint execution into multiple contexts.
* Only test .py files in use-argspec-type-path test.
* Accept identical python interpeter name or binary.
* Switch cloud tests to default container.
* Remove unused extras from pip install.
* Filter out empty pip commands.
* Don't force running of pip list.
* Support delegation for windows and network tests.
* Fix ansible-test python version usage.
* Fix ansible-test python version skipping.
* Use absolute path for log in ansible-test.
* Run vyos_command test on python 3.
* Fix windows/network instance persistence.
* Add `test/cache` dir to classification.
* Enable more python versions for network tests.
* Fix cs_router test.

test/utils/shippable/network.sh

@@ -15,7 +15,10 @@ target="network/ci/"
 # python versions to test in order
 # all versions run full tests
 python_versions=(
+    2.6
     2.7
+    3.5
+    3.6
 )
 
 if [ -s /tmp/network.txt ]; then
@@ -37,13 +40,8 @@ else
     )
 fi
 
-retry.py pip install tox --disable-pip-version-check
-
 for version in "${python_versions[@]}"; do
-    # clean up between test runs until we switch from --tox to --docker
-    rm -rf ~/.ansible/{cp,pc,tmp}/
-
     # shellcheck disable=SC2086
-    ansible-test network-integration --color -v --retry-on-error "${target}" --tox --python "${version}" ${COVERAGE:+"$COVERAGE"} ${CHANGED:+"$CHANGED"} \
-        "${platforms[@]}"
+    ansible-test network-integration --color -v --retry-on-error "${target}" --docker default --python "${version}" \
+        ${COVERAGE:+"$COVERAGE"} ${CHANGED:+"$CHANGED"} "${platforms[@]}"
 done