While making test with a node:
- with tox installed using "pip install --user" as a non-root user
- PATH modified using ~/.ssh/environment
- declared in nodepool to run as this non-root user
twine executable is not found:
using "command": twine is not found
using "shell" without /bin/bash: twine is not found
using "shell" with /bin/bash: twine is found!
Change-Id: Ia06218a830b5d44f04e0f10e0444be2cf9ad682e