Mongo 3.0.4 with WT has a lot of memory leaks

A sampling of things fixed in 3.0.5 and later.
https://jira.mongodb.org/browse/SERVER-17386
https://jira.mongodb.org/browse/SERVER-19562
https://jira.mongodb.org/browse/SERVER-17424

playbooks/roles/mongo_3_0/defaults/main.yml

@@ -3,7 +3,7 @@ mongo_logappend: true
 #This way, when mongod receives a SIGUSR1, it'll close and reopen its log file handle
 mongo_logrotate: reopen
 
-mongo_version: 3.0.4
+mongo_version: 3.0.6
 mongo_port: "27017"
 mongo_extra_conf: ''
 mongo_key_file: '/etc/mongodb_key'