Github user alopresto commented on the issue:
https://github.com/apache/nifi/pull/2084
Thanks @mcgilman and @joewitt . I rebased against `1.5.0-SNAPSHOT master`,
added the explicit dependency on `jackson-core` in
`nifi-solr-processors/pom.xml` and removed `jackson-databind` from the
`<dependencyManagement>` block in `nifi/pom.xml` and explicitly referenced the
`${jackson.version}` variable throughout the children poms. The full build
works, and I verified that not only does it compile, the project seems to be
able to correctly perform JSON parsing in a variety of ways (used [this
template](https://gist.github.com/alopresto/63c087854c5300f7c0763ce118c1eef6))
to verify.

I still need to evaluate if
`org.codehaus.jackson:jackson-mapper-asl:1.9.13` is used anywhere, as
discussion between @mcgilman and myself [revealed it is replaced by
`com.fasterxml.jackson.core:jackson-core:2.9.1`](https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-mapper-asl/1.9.13).
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