Add application metrics in the onboarding backend

A new endpoint was introduced /onboarding-api/v1.0/actuator/prometheus
in the onboarding backend, that returns application metrics in a format
consumable by prometheus, using the micrometer library.

Change-Id: I684b5cab55947c6bedee1b838343676489ad3ebf
Issue-ID: SDC-3956
Signed-off-by: andre.schmid <andre.schmid@est.tech>
diff --git a/openecomp-be/api/openecomp-sdc-rest-webapp/pom.xml b/openecomp-be/api/openecomp-sdc-rest-webapp/pom.xml
index 1dccc5c..6f8e69d 100644
--- a/openecomp-be/api/openecomp-sdc-rest-webapp/pom.xml
+++ b/openecomp-be/api/openecomp-sdc-rest-webapp/pom.xml
@@ -29,6 +29,7 @@
 		<module>togglz-rest</module>
 		<module>unique-type-rest</module>
 		<module>externaltesting-rest</module>
+		<module>metrics-rest</module>
 	</modules>
 
 </project>