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bugfixes:
  - vyos_firewall_global - fixed the facts parsers to include state-policies, redirect
  - vyos_firewall_global - fixed behavior for stanzas processing by facts in 1.4+ (e.g. present/absent stanza vs enable/disable)
trivial:
  - vyos_firewall_global - updated unit test suites to include units for 1.4+ and missing attributes (e.g. log)
  - vyos_firewall_global - re-factored integration test suite structure to D.R.Y and add support for 1.4+
  - vyos_firewall_global - cleared-up the obsolete stanzas (e.g. config-trap)