Pin bundler to 2.2.11
Pin bundler to 2.2.11

... as we did for p-o-i[1] and spec_helper[2].

[1] 4d2d86e0df434ee25a508aceb1ea209a0c64f80b
[2] a75cf9b6b18134cd6b1285740e2941bb228e053b

Change-Id: I31913176272c1da8260980fcb03deeb0f6a154ab

openstack/puppet-openstack-cookiecutter,openstack/puppet-openstack-cookiecutter,openstack/puppet-openstack-cookiecutter