setup: fixed typo on discoveryServiceCategory variable.
setup: fixed typo on discoveryServiceCategory variable.

Closes #79.

University-of-Auckland/federationregistry2-Tuakiri,REANNZ/federationregistry2-Tuakiri,REANNZ/federationregistry2-Tuakiri,ausaccessfed/federationregistry,REANNZ/federationregistry2-Tuakiri,REANNZ/federationregistry2-Tuakiri,ausaccessfed/federationregistry,University-of-Auckland/federationregistry2-Tuakiri,University-of-Auckland/federationregistry2-Tuakiri,University-of-Auckland/federationregistry2-Tuakiri,ausaccessfed/federationregistry,REANNZ/federationregistry2-Tuakiri,ausaccessfed/federationregistry,University-of-Auckland/federationregistry2-Tuakiri