Adding setup.py to charm-generator

Change-Id: I1ba69e255727703ed2f25b4f3dbabd53685573f4
Signed-off-by: Eduardo Sousa <esousa@whitestack.com>
diff --git a/descriptor-packages/tools/charm-generator/requirements.txt b/descriptor-packages/tools/charm-generator/requirements.txt
index 89ee2b0..f0aaeda 100644
--- a/descriptor-packages/tools/charm-generator/requirements.txt
+++ b/descriptor-packages/tools/charm-generator/requirements.txt
@@ -1 +1 @@
-Jinja2==2.10
+Jinja2>=2.10