python-tornado: move old version recipe from meta-oe to meta-python

Move old version recipe of python-tornado from meta-oe to meta-python
that there is a higher version in meta-python already. And rename from
_git to exact version _2.2.1.

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>