Add additional vm_memory_calculation_strategy values to cuttlefish conf

Requires rabbitmq/rabbitmq-common#224

Author: lukebakken

docs/rabbitmq.conf.example

@@ -267,10 +267,10 @@
 ##
 # vm_memory_high_watermark_paging_ratio = 0.5
 
-## Selects Erlang VM memory consumption calculation strategy. Can be `rss` or `erlang`,
-## `rss` is the default. Introduced in 3.6.11.
-## See https://github.com/rabbitmq/rabbitmq-server/issues/1223 for background.
-# vm_memory_calculation_strategy = rss
+## Selects Erlang VM memory consumption calculation strategy. Can be `allocated`, `rss` or `legacy` (aliased as `erlang`),
+## Introduced in 3.6.11. `allocated` is the default as of 3.6.13.
+## See https://github.com/rabbitmq/rabbitmq-server/issues/1223 and rabbitmq/rabbitmq-common#224 for background.
+# vm_memory_calculation_strategy = allocated
 
 ## Interval (in milliseconds) at which we perform the check of the memory
 ## levels against the watermarks.

priv/schema/rabbit.schema

@@ -686,13 +686,13 @@ end}.
 {mapping, "memory_monitor_interval", "rabbit.memory_monitor_interval",
     [{datatype, integer}]}.
 
-%% When set to rss, RabbitMQ will display the memory usage as reported
-%% by the operating system (RSS value), not by the Erlang VM.
+%% Selects Erlang VM memory consumption calculation strategy.
+%% Can be `allocated`, `rss` or `legacy` (aliased as `erlang`).
 %%
-%% {vm_memory_calculation_strategy, rss},
+%% {vm_memory_calculation_strategy, allocated},
 
 {mapping, "vm_memory_calculation_strategy", "rabbit.vm_memory_calculation_strategy",
-    [{datatype, {enum, [rss, erlang]}}]}.
+    [{datatype, {enum, [rss, erlang, allocated, legacy]}}]}.
 
 %% Set disk free limit (in bytes). Once free disk space reaches this
 %% lower bound, a disk alarm will be set - see the documentation

test/config_schema_SUITE_data/rabbit.snippets

@@ -143,6 +143,14 @@ tcp_listen_options.exit_on_close = false",
   [{rabbit,
        [{vm_memory_calculation_strategy, erlang}]}],
   []},
+ {vm_memory_calculation_strategy, "vm_memory_calculation_strategy = allocated",
+  [{rabbit,
+       [{vm_memory_calculation_strategy, allocated}]}],
+  []},
+ {vm_memory_calculation_strategy, "vm_memory_calculation_strategy = legacy",
+  [{rabbit,
+       [{vm_memory_calculation_strategy, legacy}]}],
+  []},
  {listeners_tcp_ip,
   "listeners.tcp.1 = 192.168.1.99:5672",
   [{rabbit,[{tcp_listeners,[{"192.168.1.99",5672}]}]}],