Subnet update with allocation-pools and no-allocation-pools does not reflect in Configuration DataStore

Distro: distribution-karaf-0.6.0-Carbon.tar.gz
Openstack setup: carbon + ocata
ODL setup: 3 node cluster setup

Steps:

1. Create a network:
network create net1 --provider-network-type vxlan

2. Create a subnet:
subnet create --network net1 --allocation-pool start=10.0.0.20,end=10.0.0.100 --subnet-range 10.0.0.0/24 sub1

Set allocation pool
===================
3. Update subnet:
subnet set --allocation-pool start=10.0.0.101,end=10.0.0.200 sub1

Karaf logs:
Update Subnet notification handler is invoked Original: Subnet{getAllocationPools=[AllocationPools{getEnd=IpAddress [_ipv4Address=Ipv4Address [_value=10.0.0.100]], getStart=IpAddress [_ipv4Address=Ipv4Address [_value=10.0.0.20]], augmentations={}}], getCidr=IpPrefix [_ipv4Prefix=Ipv4Prefix [_value=10.0.0.0/24]], getDnsNameservers=[], getGatewayIp=IpAddress [_ipv4Address=Ipv4Address [_value=10.0.0.1]], getHostRoutes=[], getIpVersion=class org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.constants.rev150712.IpVersionV4, getName=sub1, getNetworkId=Uuid [_value=a1159d34-fc70-4418-b980-b47103ca28b2], getProjectId=9c9916b0cd944640a4286dbf148d5c6a, getRevisionNumber=2, getTenantId=Uuid [_value=9c9916b0-cd94-4640-a428-6dbf148d5c6a], getUuid=Uuid [_value=fddc3173-1ee6-4e32-89d9-a7eeeac2bef1], isEnableDhcp=true, augmentations={}}, Update: Subnet{getCidr=IpPrefix [_ipv4Prefix=Ipv4Prefix [_value=10.0.0.0/24]], getDnsNameservers=[], getGatewayIp=IpAddress [_ipv4Address=Ipv4Address [_value=10.0.0.1]], getHostRoutes=[], getIpVersion=class org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.constants.rev150712.IpVersionV4, getName=sub1, getNetworkId=Uuid [_value=a1159d34-fc70-4418-b980-b47103ca28b2], getRevisionNumber=3, getTenantId=Uuid [_value=9c9916b0-cd94-4640-a428-6dbf148d5c6a], getUuid=Uuid [_value=fddc3173-1ee6-4e32-89d9-a7eeeac2bef1], isEnableDhcp=true, augmentations={}}

Set no-allocation pool
======================
4. Update subnet:
subnet set --allocation-pool start=10.0.0.101,end=10.0.0.200 --no-allocation-pool sub1

Karaf logs:
Update Subnet notification handler is invoked Original: Subnet{getCidr=IpPrefix [_ipv4Prefix=Ipv4Prefix [_value=10.0.0.0/24]], getDnsNameservers=[], getGatewayIp=IpAddress [_ipv4Address=Ipv4Address [_value=10.0.0.1]], getHostRoutes=[], getIpVersion=class org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.constants.rev150712.IpVersionV4, getName=sub1, getNetworkId=Uuid [_value=a1159d34-fc70-4418-b980-b47103ca28b2], getRevisionNumber=3, getTenantId=Uuid [_value=9c9916b0-cd94-4640-a428-6dbf148d5c6a], getUuid=Uuid [_value=fddc3173-1ee6-4e32-89d9-a7eeeac2bef1], isEnableDhcp=true, augmentations={}}, Update: Subnet{getCidr=IpPrefix [_ipv4Prefix=Ipv4Prefix [_value=10.0.0.0/24]], getDnsNameservers=[], getGatewayIp=IpAddress [_ipv4Address=Ipv4Address [_value=10.0.0.1]], getHostRoutes=[], getIpVersion=class org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.constants.rev150712.IpVersionV4, getName=sub1, getNetworkId=Uuid [_value=a1159d34-fc70-4418-b980-b47103ca28b2], getRevisionNumber=4, getTenantId=Uuid [_value=9c9916b0-cd94-4640-a428-6dbf148d5c6a], getUuid=Uuid [_value=fddc3173-1ee6-4e32-89d9-a7eeeac2bef1], isEnableDhcp=true, augmentations={}}

Observation:
1. In both updates, the allocation-pools values are not modified.
Whereas, while giving the "openstack subnet show sub1" command, the allocation pools are modified with updated values.
PFA for Datastore and Openstack show command.