Update SolrResults.inc

Replaced 'concatted_date_mdt' =>, with 'pb_parent_coverage_Temporal_ms' =>, in usc:test-mezzanine array section. Removed 'concatted_date_mdt' =>, from usc:collectionCModel array section.
Merge pull request #1 from usctcl/patch-1

Update SolrResults.inc