PION-1307: FileService is not correctly handling directory options with forward slashes in Windows
Made fix in FileService::set_option() and added unit tests
checkDirectoryOptionWithForwardSlash() and (for Windows only)
checkDirectoryOptionWithBackslash().
Note that checkFileServiceResponseContent() in
http_plugin_server_tests.cpp was already failing due to this, and now
passes.
Merge pull request #2 from PION-1307 to develop

# By Mignon Belongie
# Via Mignon Belongie
* commit '694e6f1b21b0f5c6ed8a1811f394e3099ed358ae':
  PION-1307: FileService is not correctly handling directory options with forward slashes in Windows Made fix in FileService::set_option() and added unit tests checkDirectoryOptionWithForwardSlash() and (for Windows only) checkDirectoryOptionWithBackslash(). Note that checkFileServiceResponseContent() in http_plugin_server_tests.cpp was already failing due to this, and now passes.