HADOOP-16451. Update jackson-databind to 2.9.9.1. Contributed by Siyao Meng.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>
(cherry picked from commit 9b8b3acb0a2b87356056c23f3d0f30a97a38cd3d)

 Conflicts:
	hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-catalog/hadoop-yarn-applications-catalog-webapp/pom.xml

hadoop-project/pom.xml

@@ -70,6 +70,7 @@
     <!-- jackson versions -->
     <jackson.version>1.9.13</jackson.version>
     <jackson2.version>2.9.9</jackson2.version>
+    <jackson2.databind.version>2.9.9.1</jackson2.databind.version>
 
     <!-- httpcomponents versions -->
     <httpclient.version>4.5.6</httpclient.version>
@@ -1034,7 +1035,7 @@
       <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-databind</artifactId>
-        <version>${jackson2.version}</version>
+        <version>${jackson2.databind.version}</version>
       </dependency>
       <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>