HADOOP-13692. hadoop-aws should declare explicit dependency on Jackson 2 jars to prevent classpath conflicts. Contributed by Chris Nauroth.

(cherry picked from commit 69620f955997250d1b543d86d4907ee50218152a)
(cherry picked from commit 2de2d0df1d4e7f5f965d787d53a44db5acefcde9)

hadoop-tools/hadoop-aws/pom.xml

@@ -213,6 +213,18 @@
       <artifactId>aws-java-sdk-s3</artifactId>
       <scope>compile</scope>
     </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-core</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-databind</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-annotations</artifactId>
+    </dependency>
     <dependency>
       <groupId>joda-time</groupId>
       <artifactId>joda-time</artifactId>