Merging postreleasefix/85 to master
Merging postreleasefix/85 to master

* postreleasefix/85:
  Skip error messages that we don't care about while attaching trackhubs

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode