test: Add Python 2.7 to nox test environment
test: Add Python 2.7 to nox test environment

It is needed for sanity checking the code against the current
deployment environment.

Signed-off-by: Nabarun Pal <46a782cbd1e9f752958998187886c2b51fda054c@gmail.com>

pythonindia/junction,pythonindia/junction,pythonindia/junction,pythonindia/junction