Expand the special path tests.

* subversion/tests/cmdline/basic_tests.py
  (special_paths_in_repos): Add some additional problematic characters,
    expand it to test files with problematic names in similarly named folders,
    add property get/set tests which test PROPFIND/PROPPATCH.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1593759 13f79535-47bb-0310-9956-ffa450edef68