added proxy code for Pool Initializer
Encapsulated CreateNode thread in PoolBuilder class
 updated cloud code to pass env
resolved create node issue
added region property in env
Updated dated field to int(13)
added lease_expire and update datatype and create/update
Updated create method for setting currect status
Added osFlavor
updated to support Image's osFlavor property
update data type to suported type
update to handle osFlavor
updated defaul for property pass
clean up
clean up
Clean up
Update allocateNode defination
update interface for new allocat method definition
cleanup
Updated getComputeServiceContext() with osName param