Modification to AuthorityGovt in crossfilter should not be in base class CrossfilterDashboard

[Brian Lewis]

Not every crossfilter will have a field AuthorityGovt; so line 176:

this.table = this.table.map(x => _.assign({}, x, { AuthorityGovt: this.lookups.cache["authorityGovt"].byCode(x.AuthorityGovt).N }));

needs to come out of crossfilterdashboard. If the substitution is required, do it when creating the dimension - see comment on issue #444

[Brian Lewis]

fix(Dashboards) Move mapping code out of base class

Move AuthorityGovt Lookup out of base class

closes #474

→ <<cset fbbf4338ed9b>>