* Readd filename string on qemuimg create
* Remove empty object on the data pool details of storage pools with no data pool
* Only use the method createPhysicalDiskByLibVirt with RBD when the pool is of erasure code type. Also added javadoc for createPhysicalDisk method
* Change literal '/' string to File.separator
* Add support for erasure code pools
* Fix null on putAll