Currently, many source files are directly placed under gluster/ dir:
When multiple packages (RPMs) are sharing the same gluster namespace,
these source files will conflict if there are source files with same
names provided by other projects.
Fix: Move all source files in gluster/* to gluster/gfapi/*
Note that this patch does not break how existing users import gfapi.
Signed-off-by: Prashanth Pai <email@example.com>