IOT-945: Fixing segmentation fault issue

IOT-945: Fixing segmentation fault issue

- Using smart pointers for managing bundles
- Changing APIs to use smart pointers

NOTE: this patch breaks backward compatibility with previous APIs

Change-Id: Ibeb833c3a0381856ca96747404302ae4bc308a39
Signed-off-by: Markus Jung <markus.jung@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/5661
Reviewed-by: Inga Stotland <inga.stotland@intel.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: JungHo Kim <jhyo.kim@samsung.com>