Modify resourceCache Unittest code

Modify resourceCache Unittest code

- modify DataCache handler type which is low pointer to shared_ptr on the dataCache for updated DataCache code
- add unittest execute option(TEST) into the SConscript file
- remove useless comments
- set code format

Change-Id: I69d22561d0d028b624c5f836e9b8bdd1cdaa44e6
Signed-off-by: YounghyunJoo <yh_.joo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2043
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>