[Review] Request from 'dmajda' @ 'SUSE/machinery/fix-comparison-differently-2'

Please review the following changes:
  * dba8391 Fix rendering of array comparison
  * daabdd8 Change Machinery::Scope#compare_with implementation
  * 46ecb5d Add tests for rendering comparisons
  * 2142d19 Extract ComapreTask#render_comparison
  * 50ccddb Implement missing Machinery::Array#hash method