Because of the bug [1] in tox 2.2.1 tox there's a need to hard-code all environment variables except the ones which are not set by Fuel CI. This patch will be reverted as soon as [1] is fixed. 1. https://bitbucket.org/hpk42/tox/issues/285/tox-220-breaks-some-toxini-config-files Closes-bug: #1517427 Change-Id: I32903c1fd5545ca56410789add7d9c2a8bbacba7