VRFS-3644 added test against MAX_TRACKS environment variable to limit quantity of jam tracks imported from production.

ruby/lib/jam_ruby/jam_track_importer.rb

@@ -2868,6 +2868,17 @@ module JamRuby
         end
       end
 
+      def import_count_exceeded?(count)
+        max = ENV['MAX_TRACKS']
+        begin
+          if Integer(max) <= count
+            return true
+          end
+        rescue
+        end
+        return false
+      end
+
       def synchronize_all(options)
         importers = []
 
@@ -2883,9 +2894,10 @@ module JamRuby
             count+=1
           end
 
-          if count > 500
-            #break
+          if import_count_exceeded?(count)
+            break
           end
+
         end