T6817 & T6825 & T7004 updates - fw_rules override and replaced fixes (#368)

• T6817 updates
• updates / additions to unit tests and code for fw_rules (t6817)
• code and use cases for override fw_rules
• ovr idem unit test for fw rules v14 in WIP
• Fixed replace add_rule func to remove unmatching confug - t6825
• first cut of unit tests for t6825 and t6817 - dfaft
• Fixed replaced unit tests and code for inbound/outbound interface attributes
• use network_cli's remove_empties
• fixed disabled=True and a few unit tests in v1.3
• add_log func for firewall_rules updated
• firewall_rules log attribute processing for v1.4 and idemp
• + In overriden :
  • Added func to compare r_sets
  • Added code to isolate r_set changes to only targeted
  • Fixed parsers for packet_length_exclude
  • started to troubleshoot filter processing
• completed fixes and unit tests for firewall_rules as in T6817 and T6825
• T7004 integration tests init fix
• 'state' attrib processing fix
• deleted and merged integration tests fixed for 1.3- and 1.4+
• fixed deleted, parsed, replaced integration tests for 1.3- and 1.4+
• fixed _remove_config, merged integration tests
• added comments to unit tests
• more v1.3- unit tests moved to 1.4+ unit test suite
• 1.3/1.4 unit test suite synced
• overridden integration test fixed
• fixed replaced idempotency
• moved data to vars (integration tests)
• updated parsed (integration tests)
• D.R.Y. for integration tests for firewall_rules plugin
• vanilla data set for integration tests to support 1.5