Fix booleans so Mongo only listens on localhost

(cherry picked from commit 54741894)

playbooks/roles/mongo/defaults/main.yml

@@ -29,7 +29,7 @@ MONGO_USERS:
     database: edxapp
     roles: readWrite
 
-MONGO_CLUSTERED: !!null
+MONGO_CLUSTERED: false
 MONGO_BIND_IP: 127.0.0.1
 
 ##

playbooks/roles/mongo/templates/mongodb.conf.j2

@@ -12,7 +12,7 @@ logappend={{ mongo_logappend }}
 {# Bind to all ips(default) if in clustered mode, 
    otherwise only to the specified local ip.
 #}
-{% if MONGO_CLUSTERED is not defined %}
+{% if not MONGO_CLUSTERED %}
 bind_ip = {{ MONGO_BIND_IP }}
 {% endif %}
 

playbooks/roles/mongo_3_0/defaults/main.yml

@@ -39,7 +39,7 @@ MONGO_USERS:
     database: edxapp
     roles: readWrite
 
-MONGO_CLUSTERED: !!null
+MONGO_CLUSTERED: false
 MONGO_BIND_IP: 127.0.0.1
 MONGO_REPL_SET: "rs0"
 

playbooks/roles/mongo_3_0/templates/mongod.conf.j2

@@ -38,7 +38,7 @@ security:
 
 {% endif %}
 net:
-{% if MONGO_CLUSTERED is not defined %}
+{% if not MONGO_CLUSTERED %}
   {# Bind to all ips(default) if in clustered mode, 
      otherwise only to the specified local ip. #}   
   bindIp: {{ MONGO_BIND_IP }}