Have linear backoff for max_p when number of files are less

[narendrachaudhary51]

In the multiprocess_functions.py file, we currently have an implementation where the number of processes is factor 2. This creates an exponential backoff when there is a failure. For example, the number of processes can be [8, 4, 2, 1]. However, we want to have a linear backoff in cases where the number of files is less.