Prevent circular dependency

MSP-10905

Use Metasploit::Framework::Version directly instead of
Msf::Framework to prevent circular dependency when starting msfconsole.

lib/msf/base/config.rb

@@ -10,7 +10,6 @@ require 'fileutils'
 # Project
 #
 
-require 'msf/core'
 require 'rex/compat'
 
 module Msf
@@ -37,16 +36,16 @@ class Config < Hash
     ['HOME', 'LOCALAPPDATA', 'APPDATA', 'USERPROFILE'].each do |dir|
       val = Rex::Compat.getenv(dir)
       if (val and File.directory?(val))
-        return File.join(val, ".msf#{Msf::Framework::Major}")
+        return File.join(val, ".msf#{Metasploit::Framework::Version::MAJOR}")
       end
     end
 
     begin
       # First we try $HOME/.msfx
-      File.expand_path("~#{FileSep}.msf#{Msf::Framework::Major}")
+      File.expand_path("~#{FileSep}.msf#{Metasploit::Framework::Version::MAJOR}")
     rescue ::ArgumentError
       # Give up and install root + ".msfx"
-      InstallRoot + ".msf#{Msf::Framework::Major}"
+      InstallRoot + ".msf#{Metasploit::Framework::Version::MAJOR}"
     end
   end