Fixed release of openliberty on version 20.0.0.5

Author: Luigi Ferrettino

pom.xml

@@ -89,7 +89,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <failOnMissingWebXml>false</failOnMissingWebXml>
-        <openliberty.version>RELEASE</openliberty.version>
+        <openliberty.version>20.0.0.5</openliberty.version>
         <openliberty.maven.version>2.6.4</openliberty.maven.version>
         <javaee-web-api.version>8.0</javaee-web-api.version>
         <microprofile-config-api.version>1.3</microprofile-config-api.version>