Merge branch 'stable'
- stable: (maint) Allow catalog_memory to be skipped on < 2.1.0 (maint) Make catalog_memory a noop unless running on 2.1.0. (PUP-3345) Fix memory leak / remove cache of "non-deprecation" resource (maint) Add memwalk.rake task that outputs a graph of bound objects (maint) Add "catalog_memory" benchmark to output heap and show mem info