allow for multiple forwarding rules per load balancer.
NOTE address reflects only the last forwarding rule seen... dasein cant
yet cope with multiple addresses.
test if healthcheck is null before removing it. should address part of
bug 4772.
fix to disallow name change of Health checks which google does not allow
Throw exception on attempt to change HC name to prevent chaos downstream
more null checking to prevent mayhem
removed redundant addProviderLoadBalancerId that was causing timeouts.
another occurance of addProviderLoadBalancerId(loadBalancerName);
reversing last commit
Merge pull request #120 from unwin/2014.05

allow for multiple forwarding rules per load balancer.