In C++HL, add a size() method to the APR hash wrappers, and convert the
hash tests to Gmock.

* subversion/bindings/cxxhl/src/aprwrap/hash.hpp (Hash::size): New method.

* subversion/bindings/cxxhl/tests/test_aprwrap.cpp (hashtest): Removed.
  (StringHash, FixedStringHash, Delete, Iterate): New test cases.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1508018 13f79535-47bb-0310-9956-ffa450edef68