increase code coverage to 80%

provider/notification-azure/pom.xml

...u/notification/di/ServiceAccountJwtClientFactoryTest.java

...up/osdu/notification/di/SubscriptionFactoryAzureTest.java

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

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

...otification/messageBus/SubscriptionClientFactoryTest.java

.../notification/messageBus/SubscriptionManagerImplTest.java

...er/azure/messageBus/extractor/RequestBodyAdapterTest.java

...vider/azure/messageBus/models/TopicSubscriptionsTest.java

...rovider/azure/messageBus/thread/ThreadDpsHeadersTest.java

...ion/provider/azure/messageBus/thread/ThreadScopeTest.java

...r/azure/messageBus/thread/ThreadSignatureServiceTest.java

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

...du/notification/pubsub/EventGridHandshakeHandlerTest.java

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

...tification/util/AzureServiceAccountValidatorImplTest.java

...p/osdu/notification/util/GoogleServiceAccountImpTest.java

.../osdu/notification/util/ServiceAccountClientImplTest.java