Checkmk Werk 12050: Consolidation of interface check plugins

ID: 12050 Title: Consolidation of interface check plugins Component: Checks & agents Level: 1 Class: New feature Version: 2.1.0i1 A lot of interface checks did exactly the same thing. The new check API allows us to consolidate them into one check plugin {{interfaces}}, without affecting the user. The following check plugins will be replaced by the new one: {{statgrab_net}}, {{emc_vplex_if}}, {{vms_if}}, {{if_brocade}}, {{if_lancom}}, {{ucs_bladecenter_if}}, {{aix_if}}, {{if}}, {{if_fortigate}}, {{hp_msa_if}}, {{if64_tplink}}. The transition to the new services is done during `cmk-update-config`. Existing rules will apply as before, no metrics will be lost. It may slightly change the "Service check command" count of the {{site_objects_counts}} plugin, depending on its configuration.