Add application metrics in the catalog backend

A new endpoint was introduced sdc2/rest/actuator/prometheus in the
catalog backend, that returns application metrics in a format
consumable by prometheus, using the micrometer library.

Change-Id: I03542e1c1a9b8b12d4e00f86e5b02c597740934b
Issue-ID: SDC-3957
Signed-off-by: andre.schmid <andre.schmid@est.tech>
diff --git a/catalog-be/pom.xml b/catalog-be/pom.xml
index 9df0805..2d74490 100644
--- a/catalog-be/pom.xml
+++ b/catalog-be/pom.xml
@@ -19,6 +19,7 @@
         <maven-dependency-plugin.version>3.2.0</maven-dependency-plugin.version>
         <replacer.plugin.version>1.5.3</replacer.plugin.version>
         <ui.version>${project.version}</ui.version>
+        <micrometer.version>1.8.4</micrometer.version>
     </properties>
 
     <dependencies>
@@ -170,6 +171,12 @@
             </exclusions>
         </dependency>
 
+      <dependency>
+          <groupId>io.micrometer</groupId>
+          <artifactId>micrometer-registry-prometheus</artifactId>
+          <version>${micrometer.version}</version>
+      </dependency>
+
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>