Support earlier versions of List::MoreUtils.
Support earlier versions of List::MoreUtils.

Spotted by Will. distinct() replaced by synonym uniq() which has been
around longer.

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