If an error occurred which prevented the lb sub resources being written to state
then the next apply would fail as the resources would already exist in the API.
go test -c ./builtin/providers/azurerm -o ./builtin/providers/azurerm/test-azurerm
TestAccAzureRMLoadBalancerBackEndAddressPool_reapply
TestAccAzureRMLoadBalancerBackEndAddressPool_removal
TestAccAzureRMLoadBalancerNatPool_basic
TestAccAzureRMLoadBalancerBackEndAddressPool_basic
TestAccAzureRMLoadBalancerNatRule_basic
TestAccAzureRMLoadBalancerNatPool_reapply
TestAccAzureRMLoadBalancerNatPool_removal
TestAccAzureRMLoadBalancerNatPool_update
TestAccAzureRMLoadBalancerProbe_basic
TestAccAzureRMLoadBalancerNatRule_removal
TestAccAzureRMLoadBalancerNatRule_update
TestAccAzureRMLoadBalancerNatRule_reapply
TestAccAzureRMLoadBalancerProbe_removal
TestAccAzureRMLoadBalancerProbe_reapply
TestAccAzureRMLoadBalancerProbe_update
TestAccAzureRMLoadBalancerRule_basic
TestAccAzureRMLoadBalancerRule_inconsistentReads
TestAccAzureRMLoadBalancerRule_removal
TestAccAzureRMLoadBalancerProbe_updateProtocol
TestAccAzureRMLoadBalancer_basic
TestAccAzureRMLoadBalancerRule_update
TestAccAzureRMLoadBalancerRule_reapply
TestAccAzureRMLoadBalancer_frontEndConfig
TestAccAzureRMLoadBalancer_tags