Make namespace of AuthAdapater singular

Author: satoryu

lib/net/ldap/auth_adapters/gss_spnego.rb renamed to lib/net/ldap/auth_adapter/gss_spnego.rb

@@ -1,5 +1,5 @@
 require 'net/ldap/auth_adapter'
-require 'net/ldap/auth_adapters/sasl'
+require 'net/ldap/auth_adapter/sasl'
 
 module Net
   class LDAP

lib/net/ldap/auth_adapters/sasl.rb renamed to lib/net/ldap/auth_adapter/sasl.rb

@@ -2,7 +2,7 @@
 
 module Net
   class LDAP
-    module AuthAdapters
+    module AuthAdapter
       class Sasl < Net::LDAP::AuthAdapter
         #--
         # Required parameters: :mechanism, :initial_credential and

lib/net/ldap/auth_adapters/simple.rb renamed to lib/net/ldap/auth_adapter/simple.rb

@@ -2,7 +2,7 @@
 
 module Net
   class LDAP
-    module AuthAdapters
+    class AuthAdapter
       class Simple < AuthAdapter
         def bind(auth)
           user, psw = if auth[:method] == :simple