Merge pull request #1158 from rutsky/patch-6

limit jinja2 version to <2.9

requirements.txt

@@ -1,3 +1,14 @@
 ansible>=2.2.1
 netaddr
-jinja2>=2.8
+# Ansible 2.2.1 requires jinja2<2.9, see <https://github.com/ansible/ansible/blob/v2.2.1.0-1/setup.py#L25>,
+# but without explicit limiting upper jinja2 version here pip ignores
+# Ansible requirements and installs latest available jinja2
+# (pip is not very smart here), which is incompatible with with
+# Ansible 2.2.1.
+# With incompatible jinja2 version "ansible-vault create" (and probably other parts)
+# fails with:
+#   ERROR! Unexpected Exception: The 'jinja2<2.9' distribution was not found 
+#   and is required by ansible
+# This upper limit should be removed in 2.2.2 release, see:
+# <https://github.com/ansible/ansible/commit/978311bf3f91dae5806ab72b665b0937adce38ad>
+jinja2>=2.8,<2.9