* Refactoring of cnos_interface module like what followed by other vendors * To remove cnos-interface from E326 validation ignore list * Effect of default parameters impacted UT
* Integration test suit for cnos_facts, cnos_config, cnos_command, enos_facts, enos_config and enos_command. * Update all_facts.yaml * Update invalid_subset.yaml * Update not_hardware.yaml * Adding cnos_backup, cnos_bgp, cnos_conditional_command, cnos_condtional_template, cnos_ethernet, cnos_portchannel, cnos_rollback. * Update README.md * Adding the sample roles for cnos_save, cnos_show_run, cnos_template, cnos_vlag and cnos_vlan
