qa_crowbarsetup: DRY rubyjsonparse function
qa_crowbarsetup: DRY rubyjsonparse function

we had 12x duplicated ruby json parser code
which is now moved to a single place in the rubyjsonparse function

vmoravec/automation,aspiers/automation,gosipyan/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,gosipyan/automation,vmoravec/automation,vmoravec/automation,vmoravec/automation,aspiers/automation,aspiers/automation,gosipyan/automation,gosipyan/automation,aspiers/automation