Add +1 to Instructor Training auto-score for Chemistry

[karenword]

If "areas of expertise" includes "Chemistry" Instructor Training applicants should now receive a +1 on their application auto-score.

[maneesha]

@karenword Is this still relevant? If so, do you see this as a one time change, or will we change how autoscoring works on a regular basis, depending on the communities we want to engage?

Which of the following applies to when you want to see this fixed?

1. Would like to see this fixed as soon as possible, in the next 1-2 development cycles (i.e., by September 2019) I would think it would be this option if it's a one time change
2. Would like to see this fixed later (by the end of 2019)
3. Would like to see this fixed, but possibly as part of a larger project that needs more planning I would think it would be this option if we see the need to make changes to autoscoring regularly
4. Not sure
5. No longer relevant - OK to close

An answer of "1 for now and 3 long term" is also perfectly acceptable!

[karenword]

I believe this is still relevant and will continue to see changes regularly (hence option 3) but tagging @ErinBecker because I submitted this PR at her request.

[ErinBecker]

1. We have a grant obligation to build a community in Chemistry. There may be changes to this scoring in the future, but at the scale of 6mo-1yr, so I'd rather make this as a "one time" change and not worry about a general solution right now.