Remove error from log "Could not validate integrity of download from file"

parent=Extension.WebHome&template=ExtensionCode.ExtensionTemplate&importExtension=true&extensionId=maven%3Aextension&repositoryId=maven-test] WARN  o.e.a.i.i.WarnChecksumPolicy   - Could not validate integrity of download from file:/home/hudsonagent/jenkins_root/workspace/XWiki_xwiki-platform_master/xwiki-platform-core/xwiki-platform-repository/xwiki-platform-repository-test/xwiki-platform-repository-test-tests/target/test-1557134044500/maven/maven/extension/maven-metadata.xml: Checksum validation failed, no checksums available  
2019-05-06 11:16:37,752 [Exec Stream Pumper] - 2019-05-06 11:16:37,752 [http://localhost:8080/xwiki/bin/view/ExtensionCode/ImportExtension?parent=Extension.WebHome&template=ExtensionCode.ExtensionTemplate&importExtension=true&extensionId=maven%3Aextension&repositoryId=maven-test] WARN  o.e.a.i.i.WarnChecksumPolicy   - Could not validate integrity of download from file:/home/hudsonagent/jenkins_root/workspace/XWiki_xwiki-platform_master/xwiki-platform-core/xwiki-platform-repository/xwiki-platform-repository-test/xwiki-platform-repository-test-tests/target/test-1557134044500/maven/maven/extension/2.0/extension-2.0.pom: Checksum validation failed, no checksums available  
2019-05-06 11:16:37,791 [Exec Stream Pumper] - 2019-05-06 11:16:37,791 [http://localhost:8080/xwiki/bin/view/ExtensionCode/ImportExtension?parent=Extension.WebHome&template=ExtensionCode.ExtensionTemplate&importExtension=true&extensionId=maven%3Aextension&repositoryId=maven-test] WARN  o.e.a.i.i.WarnChecksumPolicy   - Could not validate integrity of download from file:/home/hudsonagent/jenkins_root/workspace/XWiki_xwiki-platform_master/xwiki-platform-core/xwiki-platform-repository/xwiki-platform-repository-test/xwiki-platform-repository-test-tests/target/test-1557134044500/maven/maven/oldextension/maven-metadata.xml: Checksum validation failed, no checksums available  
2019-05-06 11:16:37,794 [Exec Stream Pumper] - 2019-05-06 11:16:37,794 [http://localhost:8080/xwiki/bin/view/ExtensionCode/ImportExtension?parent=Extension.WebHome&template=ExtensionCode.ExtensionTemplate&importExtension=true&extensionId=maven%3Aextension&repositoryId=maven-test] WARN  o.e.a.i.i.WarnChecksumPolicy   - Could not validate integrity of download from file:/home/hudsonagent/jenkins_root/workspace/XWiki_xwiki-platform_master/xwiki-platform-core/xwiki-platform-repository/xwiki-platform-repository-test/xwiki-platform-repository-test-tests/target/test-1557134044500/maven/maven/oldversionnedextension/maven-metadata.xml: Checksum validation failed, no checksums available  
2019-05-06 11:16:37,819 [Exec Stream Pumper] - 2019-05-06 11:16:37,819 [http://localhost:8080/xwiki/bin/view/ExtensionCode/ImportExtension?parent=Extension.WebHome&template=ExtensionCode.ExtensionTemplate&importExtension=true&extensionId=maven%3Aextension&repositoryId=maven-test] WARN  o.e.a.i.i.WarnChecksumPolicy   - Could not validate integrity of download from file:/home/hudsonagent/jenkins_root/workspace/XWiki_xwiki-platform_master/xwiki-platform-core/xwiki-platform-repository/xwiki-platform-repository-test/xwiki-platform-repository-test-tests/target/test-1557134044500/maven/maven/oldextension/0.9/oldextension-0.9.pom: Checksum validation failed, no checksums available  
2019-05-06 11:16:37,824 [Exec Stream Pumper] - 2019-05-06 11:16:37,824 [http://localhost:8080/xwiki/bin/view/ExtensionCode/ImportExtension?parent=Extension.WebHome&template=ExtensionCode.ExtensionTemplate&importExtension=true&extensionId=maven%3Aextension&repositoryId=maven-test] WARN  o.e.a.i.i.WarnChecksumPolicy   - Could not validate integrity of download from file:/home/hudsonagent/jenkins_root/workspace/XWiki_xwiki-platform_master/xwiki-platform-core/xwiki-platform-repository/xwiki-platform-repository-test/xwiki-platform-repository-test-tests/target/test-1557134044500/maven/maven/oldversionnedextension/10.0/oldversionnedextension-10.0.pom: Checksum validation failed, no checksums available  
2019-05-06 11:16:37,829 [Exec Stream Pumper] - 2019-05-06 11:16:37,828 [http://localhost:8080/xwiki/bin/view/ExtensionCode/ImportExtension?parent=Extension.WebHome&template=ExtensionCode.ExtensionTemplate&importExtension=true&extensionId=maven%3Aextension&repositoryId=maven-test] WARN  o.e.a.i.i.WarnChecksumPolicy   - Could not validate integrity of download from file:/home/hudsonagent/jenkins_root/workspace/XWiki_xwiki-platform_master/xwiki-platform-core/xwiki-platform-repository/xwiki-platform-repository-test/xwiki-platform-repository-test-tests/target/test-1557134044500/maven/maven/extension/1.0/extension-1.0.pom: Checksum validation failed, no checksums available