Put swap tests inside generic associative container tests so that they are executed for every tree type.

include/boost/intrusive/bstree_algorithms.hpp

@@ -1,6 +1,6 @@
 /////////////////////////////////////////////////////////////////////////////
 //
-// (C) Copyright Ion Gaztanaga  2007-2014
+// (C) Copyright Ion Gaztanaga  2007-2021
 // (C) Copyright Daniel Steck   2021
 //
 // Distributed under the Boost Software License, Version 1.0.

include/boost/intrusive/detail/config_begin.hpp

@@ -17,6 +17,7 @@
 #ifdef BOOST_MSVC
 
    #pragma warning (push)
+   #pragma warning (disable : 4619) // there is no warning number 'XXXX'
    #pragma warning (disable : 4275) // non DLL-interface classkey "identifier" used as base for DLL-interface classkey "identifier"
    #pragma warning (disable : 4251) // "identifier" : class "type" needs to have dll-interface to be used by clients of class "type2"
    #pragma warning (disable : 4675) // "method" should be declared "static" and have exactly one parameter