Distinguish between python 2 and 3

[EvaSDK]

Like the new pip formula, this formula does not allow settings up virtualenv for a given python version.
This is problematic if you need to install a python package that does not work on one version or the other as the actual installed python will depend on the defaults in the distribution. You will most likely not get both though.

See also saltstack-formulas/pip-formula#4

[mrichar1]

The code allows specifying the python key in options which is passed directly to the virtualenv state module: https://docs.saltstack.com/en/latest/ref/states/all/salt.states.virtualenv_mod.html

This should allow the python version for each virtualenv to be specified.

virtualenv-formula/virtualenv/config.sls

Lines 43 to 45 in 2e9eacb

	{% if 'python' in options %}
	- python: {{ options.python }}
	{% endif %}