add types and mandatory=True for CreateBlockDeviceDataset record attributes.
add types and mandatory=True for CreateBlockDeviceDataset record attributes.

hackday-profilers/flocker,LaynePeng/flocker,agonzalezro/flocker,runcom/flocker,LaynePeng/flocker,mbrukman/flocker,mbrukman/flocker,w4ngyi/flocker,adamtheturtle/flocker,runcom/flocker,Azulinho/flocker,hackday-profilers/flocker,moypray/flocker,agonzalezro/flocker,w4ngyi/flocker,jml/flocker,runcom/flocker,wallnerryan/flocker-profiles,wallnerryan/flocker-profiles,adamtheturtle/flocker,AndyHuu/flocker,LaynePeng/flocker,w4ngyi/flocker,AndyHuu/flocker,agonzalezro/flocker,hackday-profilers/flocker,lukemarsden/flocker,lukemarsden/flocker,Azulinho/flocker,wallnerryan/flocker-profiles,jml/flocker,achanda/flocker,jml/flocker,lukemarsden/flocker,moypray/flocker,1d4Nf6/flocker,achanda/flocker,adamtheturtle/flocker,1d4Nf6/flocker,AndyHuu/flocker,achanda/flocker,1d4Nf6/flocker,moypray/flocker,mbrukman/flocker,Azulinho/flocker