Adding a pylint tox target which only suppresses
the error codes that are currently failing.
This will prevent any of the passing checks from being
broken by future submissions.
The currently suppressed codes can be fixed by subsequent
Adds a zuul pylint target to invoke the new tox target.
Unified the install_command in tox.ini to ensure
the upper constraints are used.
Signed-off-by: albailey <Al.Bailey@windriver.com>