Subnet should report the CIDR in IPAMRange Status in its own Status

[LimKianAn]

Fixes #204

[LimKianAn]

This test should have failed, but somehow it passed.

		parsedCIDR := commonv1alpha1.MustParseCIDR(fmt.Sprintf("%s/%d", cidrAddress, rangeSize))
		By("waiting for the status of the ipam range to have the correct allocations")
		Eventually(func(g Gomega) []networkv1alpha1.IPAMRangeAllocationStatus {
			err := k8sClient.Get(ctx, ipamRangeKey, ipamRange)
			Expect(client.IgnoreNotFound(err)).NotTo(HaveOccurred())
			g.Expect(err).NotTo(HaveOccurred())
			return ipamRange.Status.Allocations
		}, timeout, interval).Should(ContainElement(networkv1alpha1.IPAMRangeAllocationStatus{
			CIDR:  &parsedCIDR,
			State: networkv1alpha1.IPAMRangeAllocationFree,
			Request: &networkv1alpha1.IPAMRangeRequest{
				Size: int32(rangeSize),
			},
		}))

This issue will be addressed in the issue #218.