Enable ra_dav tests to work in conjunction with DLL builds on Windows.
Enable ra_dav tests to work in conjunction with DLL builds on Windows.

* win-tests.py
  Construct a list of DLL files instead of just paths to those DLLs.
  (locate_libs): Copy the library DLLs and the Apache modules to the
   root of the build tree, and stop adding the DLL paths to the PATH
   environment variable.
  (Httpd.__init__): Call _svn_module with just the name of the module.
  (Httpd._svn_module): Tell Apache to look for the module at the top of 
   the build tree.

Suggested by: brane
              djh

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion