Move OPL macros to PG

[pstaabp]

This is a companion to openwebwork/pg#724 and just updates the defaults.config file to point to the new locations of macros.

You will need to checkout openwebwork/pg#724 and openwebwork/webwork-open-problem-library#949

An alternative to checking out the OPL branch you can set in conf/localOverrides.conf the following:

$pg{directories}{macrosPath} = [
   ".",                     # search the problem file's directory
   $courseDirs{macros},
   $pg{directories}{macros},
   "$pg{directories}{macros}/answers",
	 "$pg{directories}{macros}/capa",
	 "$pg{directories}{macros}/contexts",
	 "$pg{directories}{macros}/core",
	 "$pg{directories}{macros}/graph",
	 "$pg{directories}{macros}/math",
	 "$pg{directories}{macros}/misc",
	 "$pg{directories}{macros}/parsers",
	 "$pg{directories}{macros}/ui",
	 "$courseDirs{templates}/Library/macros/Alfred",
         "$courseDirs{templates}/Library/macros/BrockPhysics",
         "$courseDirs{templates}/Library/macros/CollegeOfIdaho",
         "$courseDirs{templates}/Library/macros/Dartmouth",
         "$courseDirs{templates}/Library/macros/Mizzou",
         "$courseDirs{templates}/Library/macros/WHFreeman",
         "$courseDirs{templates}/Library/macros/Wiley",
];

Note: there are other macros in the OPL macros directory that are not being used in the OPL. (For example, UW-Stout). These directories should be added to the above list if desired.

[drgrice1]

This looks good other than a minor indentation issue.

@pstaabp: Note that I rebased this pull request onto develop. So make sure to reset your local branch. It had a duplicate of one of the commits in #1792 in it that wasn't quite the same as that one.

[drgrice1]

There seems to be an inconsistency in the indentation here. All of these lines should be at the same indent level.

[pstaabp]

It was a mix of tabs and spaces. We need to do a perltidy of webwork2.

[drgrice1]

Agreed!

[drgrice1]

Once openwebwork/pg#724 goes in, this is ready to go also.