Block one more gadget type (caucho-quercus, CVE-2020-10673)

[cowtowncoder]

Another gadget type(s) reported regarding a class of caucho-quercus library.
See https://medium.com/@cowtowncoder/on-jackson-cves-dont-panic-here-is-what-you-need-to-know-54cd0d6e8062 for description of the general problem.

Mitre id: CVE-2020-10673
Reporter: threedr3am'follower

Fix is included in:

• 2.9.10.4
• 2.6.7.4 (see https://github.com/FasterXML/jackson/wiki/Jackson-Release-2.6.7.x)
• Does not affect 2.10.0 and later