Fixed CPP Conversion of nested array types

Fixed CPP Conversion of nested array types

The CPP array type was incorrectly using reserve instead of
resize for the smaller vectors.  This resulted in the index-assignment
of each element to not work properly.  This patch fixes this, so that
the arrays are properly loaded.

Change-Id: I29eb78a1dc69602087ba9861a378f478d611b0f0
Signed-off-by: Erich Keane <erich.keane@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2412
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>