FB 4924 - NPE issue. Hoping to fix, or provide better diagnostics.
Fix for deleteSnapshot test
Now throws correct exception on attempt to copy snapshot.
getVolume now returns null rather than an exception when volume not
found.  matches what StatefulVolumeTest.removeVolume is expecting.
when detach is called on an unmounted volume, it now throws the expected
exception.
createNFSVolume test now passes, as it throws an
OperationNotSupportedException when a attempt to create a NFS volume is
made.
Storage Pool support
Support for creating ICMP rules requires 0.0.0.0/0 as a CIDR
FIxes to support core changes. removed unneeded methods.
Merge pull request #143 from unwin/develop

FB 4924 - NPE issue. Hoping to fix, or provide better diagnostics.