dpdispatcher support for Sun Grid Engine(SGE) batch system

[GravityPHY]

As far as I know dpdispatcher does not support Sun Grid Engine(SGE) batch system. I tried a bit to make support to SGE happen. PBS command shares a lot similarity with SGE but different when checking job status. Currently I have written a SGE class inherit from PBS machine class(see #323 (comment)). I have tested with a vanilla python print job and it works. I can further help with testing more complex tasks submit to SGE batch system.

Here is the vanilla task
{ "command": "python3 hello.py > out.txt", "task_work_path": "./", "forward_files": [ "hello.py" ], "backward_files": [ "out.txt" ], "outlog": "log", "errlog": "err" }

and python script
import os print('Hello\n')