jackson: Update to 2.9.10 (and jackson-databind to 2.9.10.1)

Problem / Solution

We want to upgrade to the latest version of jackson that we can, yet
at this time upgrading to jackson 2.10 is problematic. Let's upgrade
instead to the latest 2.9 version - 2.9.10.1.

JIRA Issues: CSL-9183

Differential Revision: https://phabricator.twitter.biz/D410846

CHANGELOG.rst

@@ -10,6 +10,8 @@ Unreleased
 Runtime Behavior Changes
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
+* finagle: Upgrade to jackson 2.9.10 and jackson-databind 2.9.10.1 ``PHAB_ID=D410846``
+
 * finagle-core: Per-method metrics on MethodBuilder are now created lazily, so if you have
   methods that you don't use, the associated metrics won't be exported.  ``PHAB_ID=D400382``
 

build.sbt

@@ -66,10 +66,11 @@ val netty4Http = "io.netty" % "netty-codec-http" % netty4Version
 val netty4Http2 = "io.netty" % "netty-codec-http2" % netty4Version
 val netty4StaticSsl = "io.netty" % "netty-tcnative-boringssl-static" % netty4StaticSslVersion
 val opencensusVersion = "0.19.1"
-val jacksonVersion = "2.9.9"
+val jacksonVersion = "2.9.10"
+val jacksonDatabindVersion = "2.9.10.1"
 val jacksonLibs = Seq(
   "com.fasterxml.jackson.core" % "jackson-core" % jacksonVersion,
-  "com.fasterxml.jackson.core" % "jackson-databind" % jacksonVersion,
+  "com.fasterxml.jackson.core" % "jackson-databind" % jacksonDatabindVersion,
   "com.fasterxml.jackson.module" %% "jackson-module-scala" % jacksonVersion exclude("com.google.guava", "guava")
 )
 val thriftLibs = Seq(