Add latency metric for notification service

...g/opengroup/osdu/notification/util/MetricServiceImpl.java

...a/org/opengroup/osdu/notification/api/PubsubEndpoint.java

...osdu/notification/provider/interfaces/IMetricService.java

...ngroup/osdu/notification/service/NotificationHandler.java

...in/java/org/opengroup/osdu/notification/utils/Config.java

...g/opengroup/osdu/notification/api/PubsubEndpointTest.java

...up/osdu/notification/service/NotificationHandlerTest.java

...du/notification/provider/aws/utils/MetricServiceImpl.java

...otification/provider/azure/messageBus/MessageHandler.java

...cation/provider/azure/messageBus/ProcessNotification.java

...u/notification/provider/azure/util/MetricServiceImpl.java

...roup/osdu/notification/messageBus/MessageHandlerTest.java

...osdu/notification/messageBus/ProcessNotificationTest.java

...sdu/notification/provider/ibm/util/MetricServiceImpl.java