Update Jenkinsfile

Revert to simple if condition check

Jenkinsfile

@@ -58,6 +58,7 @@ pipeline {
                         }
                     }
 
+                    if (fileExists(javadocsArtifact) && fileExists(jarWithSourcesArtifact) && fileExists(jarArtifact)) {
                         echo "*** File: ${javadocsArtifact}, group: ${pom.groupId}, packaging: ${pom.packaging}, version ${pom.version}";
                         echo "*** File: ${jarWithSourcesArtifact}, group: ${pom.groupId}, packaging: ${pom.packaging}, version ${pom.version}";
                         echo "*** File: ${jarArtifact}, group: ${pom.groupId}, packaging: ${pom.packaging}, version ${pom.version}";
@@ -77,6 +78,9 @@ pipeline {
                                [artifactId: pom.artifactId, classifier: '', file: "pom.xml", type: "pom"]
                             ]
                         )
+                    } else {
+                        error "*** Files could not be found";
+                    }
                 }
             }
         }