Fix ContainerParams.txt filename

      This file path is referenced as configParams/ContainerParams.txt in
    the Thorfile but the real filename is containerParams.txt so build can't
    be done:

    $ thor build:dev my
    :: Deleting other development files...
    :: Building full source file /dist/kinetic-vmy.js...
    $PWD/Thorfile:153:in `read': No such file or directory - \
      configParams/ContainerParams.txt (Errno::ENOENT)

      It was fixed in 04ddd321 by changing the path in the Thorfile, but
    broken by 912cef43.

      This change rename the file with the correct name.

Previous issue was: #316.