[GLOBAL] Move checkbashisms to a dedicated script

Using a dedicated shell script rather than scripts commands directly
in tox.ini configuration is usually recommanded.
It avoids quoting hell issues and ensures a better virtualenv isolation.

Issue-ID: OOM-2643
Signed-off-by: guillaume.lambert <guillaume.lambert@orange.com>
Co-authored-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: Ic4764f628d6f8c3bb4d0dd36a0559603c80f6c4a
2 files changed