Report Numerical Issues does not issue a warning for a singular Jacobian

[dallan-keylogic]

When troubleshooting issues revealed by #1395, I encountered this:

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Model Statistics

    Jacobian Condition Number: 9.195E+14

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1 WARNINGS

    WARNING: 54 pairs of variables are parallel (to tolerance 1.0E-08)

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6 Cautions

    Caution: 72 Variables with value close to zero (tol=1.0E-08)
    Caution: 84 Variables with extreme value (<1.0E-04 or >1.0E+04)
    Caution: 8 Variables with None value
    Caution: 74 Variables with extreme Jacobian values (<1.0E-04 or >1.0E+04)
    Caution: 54 Constraints with extreme Jacobian values (<1.0E-04 or >1.0E+04)
    Caution: 76 extreme Jacobian Entries (<1.0E-04 or >1.0E+04)

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Suggested next steps:

    display_near_parallel_variables()

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This matrix is more-or-less singular, which is why it's shocking that we're not issuing a warning for it.

[ksbeattie]

This requires #1429 and will also require many models to improve their scaling. A working session with all the owners of the impacted models is being organized.