Fixed the authentication test

fda-authentication-service/rest-service/src/test/resources/application.properties

@@ -16,3 +16,6 @@ spring.datasource.password=password
 spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
 spring.jpa.hibernate.ddl-auto=create-drop
 spring.jpa.show-sql=false
+
+# disable mail health check
+management.health.mail.enabled=false
\ No newline at end of file