Added repository with new domain for JFrog Artifactory SaaS.

https://jfrog.com/knowledge-base/deprecation-of-artifactoryonline-com-domain/
https://stackoverflow.com/questions/30824672/jasperreports-maven-broken

Revert "Added missing dependency for Ubuntu 18.04 + 20.04"

This reverts commit 5ff5f057b4.

libreplan-webapp/pom.xml

@@ -398,13 +398,6 @@
             <scope>test</scope>
         </dependency>
 
-        <!-- Open Java API for OLAP -->
-        <dependency>
-            <groupId>org.olap4j</groupId>
-            <artifactId>olap4j</artifactId>
-            <version>1.2.0</version>
-        </dependency>
-
         <!-- Easymock -->
         <dependency>
             <groupId>org.easymock</groupId>

pom.xml

@@ -170,6 +170,12 @@
             <id>thirdparty</id>
             <url>https://nexus.libreplan.dev/repository/thirdparty-libreplan16/</url>
         </repository>
+
+        <!-- JFrog Artifactory SaaS repository -->
+        <repository>
+            <id>jaspersoft-third-party</id>
+            <url>https://jaspersoft.jfrog.io/jaspersoft/third-party-ce-artifacts/</url>
+        </repository>
     </repositories>
 
     <!-- Dependency management -->