Change class name to MetasploitModule

Author: wchen-r7

modules/exploits/multi/postgres/postgres_createlang.rb

@@ -6,7 +6,7 @@
 require 'msf/core'
 require 'msf/core/exploit/postgres'
 
-class Metasploit4 < Msf::Exploit::Remote
+class MetasploitModule < Msf::Exploit::Remote
   Rank = GoodRanking
 
   include Msf::Exploit::Remote::Postgres