Merge: When allocators aren't equal use a slow swap.

[SVN r42191]

test/exception/Jamfile.v2

@@ -21,5 +21,5 @@ test-suite unordered-tests
         [ run erase_tests.cpp framework ]
         [ run rehash_tests.cpp framework ]
         [ run swap_tests.cpp framework : : :
-            <define>BOOST_UNORDERED_SWAP_METHOD=3 ]
+            <define>BOOST_UNORDERED_SWAP_METHOD=2 ]
     ;