Improve MoleQueue job descriptions.

Job descriptions are now:

[Formula] | [Calculation type] | [Theory]/[Basis]\n
[Title]

If any of these "standard" options are missing, they are gracefully
omitted from the description.

Change-Id: I4fc5f189a219f31bf595f47ac0e6e6e7055e7024
Merge topic 'molequeue-job-title' into master

3a75a75b Improve MoleQueue job descriptions.