fix missing better test data and bug in connection_manager.rb relating to line 111

db/manifest

@@ -126,4 +126,5 @@ track_download_counts.sql
 scores_mod_users2.sql
 user_bio.sql
 track_changes_counter.sql
+scores_better_test_data.sql
 

ruby/lib/jam_ruby/connection_manager.rb

@@ -51,6 +51,7 @@ module JamRuby
       # we will reconnect the same music_session that the connection was previously in,
       # if it matches the same value currently in the database for music_session_id
       music_session_id_expression = 'NULL'
+      joined_session_at_expression = 'NULL'
       unless reconnect_music_session_id.nil?
         music_session_id_expression = "(CASE WHEN music_session_id='#{reconnect_music_session_id}' THEN music_session_id ELSE NULL END)"
         joined_session_at_expression = "(CASE WHEN music_session_id='#{reconnect_music_session_id}' THEN NOW() ELSE NULL END)"