revert collect naming

Author: SugatD

tasks/install_puppetserver.sh

@@ -144,9 +144,7 @@ fi
 osname=$(parse_platform "$platform" "osname")
 major_version=$(parse_platform "$platform" "majorversion")
 osfamily=$(fetch_osfamily "$osname")
-# Keep the full collection name (e.g., puppet8-nightly) instead of truncating
-# collection=$(fetch_collection "$collection")
-collection=$collection
+collection=$(fetch_collection "$collection")
 
 if [[ "$collection" == "puppet5" ]]; then
   echo "puppet5 eol!"