chore: Set default revision value to avoid build errors

Author: m-seidel

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
         java-version: ${{ matrix.java }}
 
     - name: Build with Maven
-      run: mvn -B package --file pom.xml
+      run: mvn -B package --file pom.xml -Drevision=${{ github.event.release.tag_name }}
 
     - name: Run UI tests
       run: make test

pom.xml

@@ -70,6 +70,7 @@
         </repository>
     </distributionManagement>
     <properties>
+        <revision>1.2.9</revision>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
         <osgi.export>