Continue to refactor arg.cpp
Continue to refactor arg.cpp

Simple cleanup. No changes in functionality.

Major observable is to split process_args() into two functions
  - The loop over the Environment variables
  - The loop over the Command Line



Compiled:   STD on clang    STD/LLVM on gcc

Tested:     Ran some test cases of setting up the command line
            paratest

Reviewed:   None




git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@23616 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

hildeth/chapel,CoryMcCartan/chapel,hildeth/chapel,CoryMcCartan/chapel,hildeth/chapel,hildeth/chapel,sungeunchoi/chapel,CoryMcCartan/chapel,chizarlicious/chapel,chizarlicious/chapel,sungeunchoi/chapel,hildeth/chapel,chizarlicious/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,sungeunchoi/chapel,chizarlicious/chapel,CoryMcCartan/chapel,chizarlicious/chapel,CoryMcCartan/chapel,chizarlicious/chapel,hildeth/chapel,hildeth/chapel,chizarlicious/chapel,sungeunchoi/chapel,sungeunchoi/chapel,sungeunchoi/chapel,sungeunchoi/chapel,CoryMcCartan/chapel