Changes to elter document data model

• Changes to elterDocument data model
  • removed descriptiveKeywords, notGEMINI
  • added elterProject, distributorContacts
• Added elterDocument to Solr index and facets
• Set default resourceStatus of "unknown" for GEMINI and elter documents
• Added elterCL vocabulary to keyword picker for elter
• Added Jena indexer for Elter Documents
• Added new resource type "nerc signpost" - with subsequent changes to templates, WAFcontroller and metadata quality service
• Changed KeywordVocabularyView.js to disable form controls when controlled term is selected