parallel_cucumber not taking files from profile ("pass files or folders to run")

Hi

Trying to use this commandline to get parallel_cucumber to run scenarios based on the profile specified using the -o option:

```batch
parallel_cucumber --verbose -o "-p smoketest"
```
As far as I can tell, this is supposed to be supported atm?

__Versions:__
```
ruby 2.4.2p198 (2017-09-14 revision 59899) [i386-mingw32]

parallel_tests (2.19.0)
cucumber (3.0.2)
```