Refactor fuel syntax check script

- Check syntax for changed modules only
- Use 'rake lint' instead of 'puppet-lint' where possible
- Use 'bundle' for rake lint tests
- Fix current syntax errors that break 'rake lint' or disable
  'fail_on_warnings' option for lint

Closes-bug: #1340336
Change-Id: I66c5b4799dafc32e7903c16365a277109cfb6723
Merge "Refactor fuel syntax check script"