providers: New certification touch provider
touch-provider:touch.pxu: typos fixed
touch-provider:manage.py: Set strict=False

As we don't provide estimated duration
provider-touch:requirements: Added auto-tests with manage.py validate -N
touch-provider: Added missing test plan description
"automatic merge of lp:~sylvain-pineau/checkbox/certification-touch-provider/ by tarmac [r=zkrynicki][bug=][author=sylvain-pineau]"