devector.hpp assumes allocator_traits_type is always present

[John Maddock]

Many tests fail with Oracle C++ because devector has:

      devector& operator=(BOOST_RV_REF(devector) x)
         BOOST_NOEXCEPT_IF(vector<T>::allocator_traits_type::propagate_on_container_move_assignment::value)

I suspect use of vector here needs to be namespace qualified to avoid confusion with std::vector, as Oracle C++ outputs:

"../../../boost/thread/csbl/devector.hpp", line 61: Error: allocator_traits_type is not a member of std::vector<boost::detail::nullary_function<void()> >.

However, there's another issue, the code in <boost/thread/csbl/vector.hpp> can be configured to really use std::vector here (I haven't checked if that's the case with Oracle C++), and clearly std::vector has no such member.

[viboes]

Right, it seems that vector<T>::allocator_traits_type::propagate_on_container_move_assignment::value is specific to Boost.Container :(

I will fix both soon.

[viboes]

​https://github.com/boostorg/thread/commit/ac603f6bd1d60daab741001037db3017a3a92f67