Fix undefined local variable or method `n'

Fix Error: Failed to apply catalog: undefined local variable or method `n' for Puppet::Type::Mongodb_replset::ProviderMongo:Class

Author: FunFR

lib/puppet/provider/mongodb.rb

@@ -140,7 +140,7 @@ def self.mongo_eval(cmd, db = 'admin', retries = 10, host = nil)
     rescue => e
       retry_count -= 1
       if retry_count > 0
-        Puppet.debug "Request failed: '#{e.message}' Retry: '#{n}'"
+        Puppet.debug "Request failed: '#{e.message}' Retry: '#{retries - retry_count}'"
         sleep retry_sleep
         retry
       end