Rename RepeatedProc to Repeated and move to func or proc package

[fabriciofx]

To me seems RepeatedProc has two problems:

1. It's in the wrong package (org.cactoos). and it should be in org.cactoos.func or org.cactoos.proc package

2. It's a decorator, so should be renamed to Repeated

@victornoel WDYT?

[0crat]

@paulodamaso/z, @victornoel/z please, pay attention to this issue

[victornoel]

@fabriciofx yes, let's tackle that simply as part of #1406

[fabriciofx]

@victornoel I'll wait for finish #1406 to close this ticket, ok?

[victornoel]

@fabriciofx I think it's ok to close it right now, but feel free to track it and close it when it is actually fixed if you want :)

[fabriciofx]

@victornoel I agree. I'll close it now. Thanks!

[0crat]

Job gh:yegor256/cactoos#1409 is not assigned, can't get performer