Fix B3LYP functional, which is supposed to use VWN(RPA) not VWN5.

[susilehtola]

Description

Fixes B3LYP. Closes #167

Motivation and Context

B3LYP should be B3LYP, not B3LYP5.

How Has This Been Tested?

Screenshots (if appropriate):

Todos

• Developer Interest

• [ ] Feature1

• User-Facing for Release Notes

• [ ] Feature2

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Questions

• [ ] Question1

Status

• [x] Ready to go