Add constraints for Jinja2 on Python 2.6. (#66826)

* Add constraint for Jinja2 on Python 2.6.

* Fix constraint in inventory_aws_conformance test.

* Add constrraints for template_jinja2_latest test.

changelogs/fragments/ansible-test-jinja2-python-2.6.yml

@@ -0,0 +1,2 @@
+bugfixes:
+    - ansible-test now limits Jinja2 installs to version 2.10 and earlier on Python 2.6

test/integration/targets/inventory_aws_conformance/runme.sh

@@ -4,7 +4,7 @@ set -eux
 
 source virtualenv.sh
 
-pip install "python-dateutil>=2.1,<2.7.0" jmespath "Jinja2>=2.10"
+pip install "python-dateutil>=2.1,<2.7.0" jmespath "Jinja2==2.10"
 
 # create boto3 symlinks
 ln -s "$(pwd)/lib/boto" "$(pwd)/lib/boto3"

test/integration/targets/template_jinja2_latest/requirements.txt

@@ -0,0 +1,2 @@
+jinja2 < 2.11 ; python_version < '2.7' # jinja2 2.11 and later require python 2.7 or later
+jinja2 ; python_version >= '2.7'

test/integration/targets/template_jinja2_latest/runme.sh

@@ -4,7 +4,7 @@ set -eux
 
 source virtualenv.sh
 
-pip install -U jinja2
+pip install -U -r requirements.txt
 
 ANSIBLE_ROLES_PATH=../
 export ANSIBLE_ROLES_PATH

test/lib/ansible_test/_data/requirements/constraints.txt

@@ -2,6 +2,7 @@ coverage >= 4.2, < 5.0.0, != 4.3.2 ; python_version <= '3.7' # features in 4.2+
 coverage >= 4.5.4, < 5.0.0 ; python_version > '3.7' # coverage had a bug in < 4.5.4 that would cause unit tests to hang in Python 3.8, coverage 5.0+ incompatible
 cryptography < 2.2 ; python_version < '2.7' # cryptography 2.2 drops support for python 2.6
 deepdiff < 4.0.0 ; python_version < '3' # deepdiff 4.0.0 and later require python 3
+jinja2 < 2.11 ; python_version < '2.7' # jinja2 2.11 and later require python 2.7 or later
 urllib3 < 1.24 ; python_version < '2.7' # urllib3 1.24 and later require python 2.7 or later
 pywinrm >= 0.3.0 # message encryption support
 sphinx < 1.6 ; python_version < '2.7' # sphinx 1.6 and later require python 2.7 or later