Modify resourceCache unittest buildscript to fix gcc bug

Modify resourceCache unittest buildscript to fix gcc bug

- on gcc-4.6 in linux 64bit environment, gcc bug is occurred.
  To fix it, remove the '-Wnoexcept' option in the SConscript file
- additionally, remove constructor, destructor on the unittest class
  to prevent build error(noexcept tag) on gcc-4.8

Change-Id: I411ca979e607cdfe33ea50f9fe32b88b434320ed
Signed-off-by: YounghyunJoo <yh_.joo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/1970
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>