Description of problem:
Currently the way readdirp is designed, there can be no two parallel readdir issued on the same fd(because of the fd ctx structure and the way it is built and used). But it is not impossible to issue two readdirps on the same fd. Hence fix this use case.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
This is not really a priority now, hence closing this bug until a strong need for the same arises.