Fix detection of management_ip_address for rabbitmqadmin

This fixes inconsistent logic to determine management ip address if
the rabbitmq::management_ip_address parameter is not set, and makes
sure all logic tries to look up the rabbitmq::node_ip_address
parameter.

Author: kajinamit

manifests/install/rabbitmqadmin.pp

@@ -27,9 +27,15 @@
 
     $default_user = $rabbitmq::default_user
     $default_pass = $rabbitmq::default_pass
-    $management_ip_address = $rabbitmq::management_ip_address
     $archive_options = $rabbitmq::archive_options
 
+    # This should be consistent with rabbitmq::config
+    if $rabbitmq::management_ip_address {
+      $management_ip_address = $rabbitmq::management_ip_address
+    } else {
+      $management_ip_address = $rabbitmq::node_ip_address
+    }
+
     if !($management_ip_address) {
       # Pull from localhost if we don't have an explicit bind address
       $sanitized_ip = '127.0.0.1'