Azure unit test TestGetSubscriptionIdFromInstanceMetadata is failing with nil pointer

[mwielgus]

Logs are below:

W0201 08:28:22.137334   16230 azure_util.go:337] Template improperly formatted
W0201 08:28:22.141498   16230 azure_util.go:337] Template improperly formatted
E0201 08:28:22.151560   16230 azure_agent_pool.go:409] Get name for instance {"/subscriptions/sub/resourceGroups/rg/providers/provider/virtualMachines/as-vm-0/"} failed: resource name was missing from identifier
W0201 08:28:22.153655   16230 azure_agent_pool.go:546] NIC ID is not set for VM (rg/as-vm-0)
I0201 08:28:22.153723   16230 azure_agent_pool.go:555] deleting VM: rg/as-vm-0
I0201 08:28:22.153800   16230 azure_agent_pool.go:559] waiting for VirtualMachine deletion: rg/as-vm-0
I0201 08:28:22.153883   16230 azure_agent_pool.go:586] found os disk storage reference: foo vhds bar.vhd
I0201 08:28:22.153942   16230 azure_agent_pool.go:588] deleting blob: vhds/bar.vhd
E0201 08:28:22.918923   16230 azure_agent_pool.go:415] Delete virtual machine "as-vm-0" failed: storage: service returned error: StatusCode=403, ErrorCode=AccountIsDisabled, ErrorMessage=The specified account is disabled.
RequestId:48aef6ef-f01e-011e-1974-f8c979000000
Time:2021-02-01T08:28:22.8930697Z, RequestInitiated=Mon, 01 Feb 2021 08:28:21 GMT, RequestId=48aef6ef-f01e-011e-1974-f8c979000000, API Version=, QueryParameterName=, QueryParameterValue=
W0201 08:28:22.922843   16230 azure_agent_pool.go:546] NIC ID is not set for VM (rg/as-vm-0)
I0201 08:28:22.922911   16230 azure_agent_pool.go:555] deleting VM: rg/as-vm-0
I0201 08:28:22.922943   16230 azure_agent_pool.go:559] waiting for VirtualMachine deletion: rg/as-vm-0
I0201 08:28:22.923007   16230 azure_agent_pool.go:586] found os disk storage reference: foo vhds bar.vhd
I0201 08:28:22.923035   16230 azure_agent_pool.go:588] deleting blob: vhds/bar.vhd
E0201 08:28:22.972393   16230 azure_agent_pool.go:415] Delete virtual machine "as-vm-0" failed: storage: service returned error: StatusCode=403, ErrorCode=AccountIsDisabled, ErrorMessage=The specified account is disabled.
RequestId:48aef715-f01e-011e-3b74-f8c979000000
Time:2021-02-01T08:28:22.9461082Z, RequestInitiated=Mon, 01 Feb 2021 08:28:22 GMT, RequestId=48aef715-f01e-011e-3b74-f8c979000000, API Version=, QueryParameterName=, QueryParameterValue=
--- FAIL: TestGetSubscriptionIdFromInstanceMetadata (0.01s)
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x1eb0412]

goroutine 61 [running]:
testing.tRunner.func1.1(0x2091bc0, 0x34b9920)
	/opt/hostedtoolcache/go/1.14.14/x64/src/testing/testing.go:999 +0x461
testing.tRunner.func1(0xc0001fb680)
	/opt/hostedtoolcache/go/1.14.14/x64/src/testing/testing.go:1002 +0x606
panic(0x2091bc0, 0x34b9920)
	/opt/hostedtoolcache/go/1.14.14/x64/src/runtime/panic.go:975 +0x3e3
k8s.io/autoscaler/cluster-autoscaler/cloudprovider/azure.TestGetSubscriptionIdFromInstanceMetadata(0xc0001fb680)
	/home/runner/work/autoscaler/autoscaler/go/src/k8s.io/autoscaler/cluster-autoscaler/cloudprovider/azure/azure_config_test.go:243 +0x62
testing.tRunner(0xc0001fb680, 0x2343968)
	/opt/hostedtoolcache/go/1.14.14/x64/src/testing/testing.go:1050 +0x1ec
created by testing.(*T).Run
	/opt/hostedtoolcache/go/1.14.14/x64/src/testing/testing.go:1095 +0x538
FAIL	k8s.io/autoscaler/cluster-autoscaler/cloudprovider/azure	0.955s

[mwielgus]

cc:
@feiskyer
@nilo19
@marwanad