add a dependency to hello-samza project in order to work with the upgraded jackson 1.9.13 library

When upgrading to jackson 1.9.13 version in order to be compatible with ne Yarn versions, a new dependency should be added to its pom.xml file.
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>

Without this additional dependency Job fails to run with jackson 1.9.13 lib on samza 0.10.1