Use sessionDate and publication year to infere the publication date. Fix bug...

Use sessionDate and publication year to infere the publication date. Fix bug regarding the display of publication year. write tests. It fixes icat/doi-landing-page#68.
Status Job ID Name Coverage
  Build
failed #27337
build

 
  Deploy
skipped #27338
allowed to fail manual
deploy_production
 
Name Stage Failure
failed
build Build There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job trace