find_node_by_field and find_leaf_by_field can return more than one node
find_node_by_field and find_leaf_by_field can return more than one node

Conflicts:

	modules/Bio/EnsEMBL/Compara/NestedSet.pm

Ensembl/ensembl-compara,ckongEbi/ensembl-compara,kumarsaurabh20/ensembl-compara,danstaines/ensembl-compara,danstaines/ensembl-compara,Ensembl/ensembl-compara,kumarsaurabh20/ensembl-compara,danstaines/ensembl-compara,ckongEbi/ensembl-compara,danstaines/ensembl-compara,Ensembl/ensembl-compara,dbolser-ebi/ensembl-compara,etapanari/ensembl-compara,dbolser-ebi/ensembl-compara,dbolser-ebi/ensembl-compara,etapanari/ensembl-compara,Ensembl/ensembl-compara,kumarsaurabh20/ensembl-compara,etapanari/ensembl-compara,Ensembl/ensembl-compara,danstaines/ensembl-compara,Ensembl/ensembl-compara,kumarsaurabh20/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,etapanari/ensembl-compara,ckongEbi/ensembl-compara