Enabled elasticsearch 2.4 support by using type string.
Enabled elasticsearch 2.4 support by using type string.

monotek/zammad,zammad/zammad,zammad/zammad,zammad/zammad,zammad/zammad,zammad/zammad,zammad/zammad,monotek/zammad,monotek/zammad,monotek/zammad,monotek/zammad,monotek/zammad