[IOT-3121] Fix rts values of Collection Resource
[IOT-3121] Fix rts values of Collection Resource

For baseline response of collection, value of rt & rts
are same for current implementation, which is wrong.
rts should reflect the resource types of the chlidren
of the collection.

Change-Id: Ib4e768c7401247dc9dd4917ff5a611396e8e07a2
Signed-off-by: Mushfiqul Islam Antu <35c68d0549722db00392e617f411be2ac5f081ab@samsung.com>

iotivity/iotivity,rzr/iotivity,iotivity/iotivity,iotivity/iotivity,rzr/iotivity,iotivity/iotivity,rzr/iotivity,iotivity/iotivity,rzr/iotivity,rzr/iotivity,iotivity/iotivity,rzr/iotivity,rzr/iotivity,iotivity/iotivity,iotivity/iotivity