Merge branch...

Merge branch '28.623_Rel16_CR0238_Clarify_reporting_and_monitoring_period_usage_in_SupportedPerfMetricGroup_datatype_yang' into 'Integration_Rel16_SA5_147_YANG'

28.623 rel16 cr0238 clarify reporting and monitoring period usage in supported perf metric group datatype yang

See merge request !523