Fixing project being build twice in CI

Author: staudtMarius

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - Fixed `MappingEntryies` not getting processed by adding `Getter` methods for record fields [#1084](https://github.com/ie3-institute/PowerSystemDataModel/issues/1084) 
 - Fixed "depth of discharge" in documentation [#872](https://github.com/ie3-institute/PowerSystemDataModel/issues/872)
+- Fixed project beiing build twice in CI [#994](https://github.com/ie3-institute/PowerSystemDataModel/issues/994)
 
 ### Changed
 - Improvements to the search for corner points in `IdCoordinateSource` [#1016](https://github.com/ie3-institute/PowerSystemDataModel/issues/1016)

Jenkinsfile

@@ -113,7 +113,7 @@ node {
         gradle('--refresh-dependencies clean spotlessCheck pmdMain pmdTest spotbugsMain ' +
             'spotbugsTest test jacocoTestReport jacocoTestCoverageVerification', projectName)
 
-        sh(script: """set +x && cd $projectName""" + ''' set +x; ./gradlew clean javadoc''', returnStdout: true)
+        sh(script: """set +x && cd $projectName""" + ''' set +x; ./gradlew javadoc''', returnStdout: true)
       }
 
       // sonarqube analysis
@@ -156,7 +156,7 @@ node {
              */
             sh(
                 script: """set +x && cd $projectName""" +
-                ''' set +x; ./gradlew clean javadoc''',
+                ''' set +x; ./gradlew javadoc''',
                 returnStdout: true
                 )