Addresses possible returned null value from 'FloatingIPApi.create()'. 
If upon check we find null then throw InsufficientResourcesException. This in 
turn will make a second check at IP allocation by iterating through 
'FloatingIPApi.list()' and grabbing an available IP. If this subsequent 
call fails then re-throw InsufficientResourcesException.
You can merge this Pull Request by running:

  git pull https://github.com/cdancy/jclouds JCLOUDS-607

Or you can view, comment on it, or merge it online at:

  https://github.com/jclouds/jclouds/pull/425

-- Commit Summary --

  * JCLOUDS-607: ComputeService.createNodesInGroup throws NPE on 
FloatingIPApi.create()

-- File Changes --

    M 
apis/openstack-nova/src/main/java/org/jclouds/openstack/nova/v2_0/compute/functions/AllocateAndAddFloatingIpToNode.java
 (13)

-- Patch Links --

https://github.com/jclouds/jclouds/pull/425.patch
https://github.com/jclouds/jclouds/pull/425.diff

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