tubdok: rework transformation rules

[felixlohmeier]

• add column subject based on dc:subject
• add value "Technische Universität Hamburg" if dc:publisher is empty
• rename column alternativeTitle to translatedTitle
• remove column source
• remove duplicate values in column resourceType
  • error: resourceType: org.apache.solr.common.SolrException: ERROR: [doc=10.15480_882.27] multiple values encountered for non multiValued field resourceType: [Journal Issue,​ Periodical Part]
• add column collection with value "Tubdok"
• unify values "Präsident der Technischen Universität Hamburg-Harburg" and "Technische Universität Hamburg-Harburg" in column creatorName