MINOR: Upgrade to Jackson 2.9.7 (#5662)
MINOR: Upgrade to Jackson 2.9.7 (#5662)

This contains important fixes:

https://github.com/FasterXML/jackson/wiki/Jackson-Release-2.9.7

Reviewers: Rajini Sivaram <2e743c5cf650e12d7db950775eab7636545b5b8c@googlemail.com>
Chasego/kafka,Chasego/kafka,guozhangwang/kafka,KevinLiLu/kafka,guozhangwang/kafka,apache/kafka,gf53520/kafka,mihbor/kafka,TiVo/kafka,gf53520/kafka,sslavic/kafka,TiVo/kafka,sslavic/kafka,guozhangwang/kafka,TiVo/kafka,apache/kafka,noslowerdna/kafka,Chasego/kafka,KevinLiLu/kafka,KevinLiLu/kafka,apache/kafka,apache/kafka,noslowerdna/kafka,mihbor/kafka,KevinLiLu/kafka,gf53520/kafka,mihbor/kafka,lindong28/kafka,noslowerdna/kafka,sslavic/kafka,lindong28/kafka,Chasego/kafka,lindong28/kafka,mihbor/kafka,lindong28/kafka,guozhangwang/kafka,gf53520/kafka,TiVo/kafka,noslowerdna/kafka,sslavic/kafka