Add allure-pytest tox profiles for local use

Add allure-pytest tox profiles for local use

When the allure-report folder is present, the default launcher for tests
currently based on pytest now uses allure report related options.

"allure serve tests/allure-report/" can be rund afterwards to view the
report in browser.

These capacities have been scripted in tox and are now used by default
to ensure CI.

JIRA: TRNSPRTPCE-685
Change-Id: Ic27b3efa1a77c1f2c55338861b8a6f60f9c47e02
Co-authored-by: guillaume.lambert <guillaume.lambert@orange.com>
Signed-off-by: Tianliang Zhang <zhangtleon@gmail.com>
Signed-off-by: guillaume.lambert <guillaume.lambert@orange.com>