Add server MB usage to rake evm:status and status_full.

[jrafanie]

Similar to #15375 committed in 5be3b45 but for the server process.

03:57:00 ~/Code/manageiq (add_server_mb_usage_in_evm_status) (2.4.1) + bin/rails evm:status
** Using session_store: ActionDispatch::Session::MemCacheStore
Checking EVM status...
 Zone    | Server | Status  |            ID |   PID |  SPID | URL                     | Started On           | Last Heartbeat       | MB Usage | Master? | Active Roles
---------+--------+---------+---------------+-------+-------+-------------------------+----------------------+----------------------+----------+---------+-----------------------------------------------------------------------------------------------------------------------------------------------------
 default | EVM    | started | 1000000000001 | 39527 | 39538 | druby://127.0.0.1:61862 | 2017-06-27T19:55:04Z | 2017-06-27T19:56:46Z |      194 | true    | automate:database_operations:database_owner:ems_inventory:ems_operations:event:reporting:scheduler:smartstate:user_interface:web_services:websocket

 Worker Type       | Status  |            ID |   PID | SPID  |     Server id | Queue Name / URL    | Started On           | Last Heartbeat       | MB Usage
-------------------+---------+---------------+-------+-------+---------------+---------------------+----------------------+----------------------+----------
 MiqGenericWorker  | started | 1000000000117 | 39541 | 39575 | 1000000000001 | generic             | 2017-06-27T19:55:36Z | 2017-06-27T19:57:01Z |      194
 MiqScheduleWorker | started | 1000000000118 | 39542 | 39576 | 1000000000001 |                     | 2017-06-27T19:55:36Z | 2017-06-27T19:56:50Z |      273
 MiqUiWorker       | started | 1000000000119 | 39543 |       | 1000000000001 | http://0.0.0.0:3000 | 2017-06-27T19:55:36Z | 2017-06-27T19:57:01Z |      176

[miq-bot]

Checked commit jrafanie@0476fa7 with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0
1 file checked, 0 offenses detected
Everything looks fine. 👍

[NickLaMuro]

Looks like code!