unrequire title for accession records
remove obsolete warnings tests
generate read only labels for accessions

squash with previous
use label for title in frontend linkers
fix auto generate glitch
Set the Accession's indexed 'title' to be it's 'label' (used for linker, search results); Also allow browsing of accession via the linker and use the new 'label' value on readonly and edit templates;
Fix selenium tests - where accession title has become 'label'
Merge pull request #483 from hudmol/49089827-unrequire-accession-title

unrequire title for accession records