fsync makeflow's logfile after each node state change.

Requested by Dodi (CRC). This protects the log when the computing node
fails before propagating the changes in AFS.
fsync at most one per minute.
Added missing else when parsing wq_pool configuration
Merge branch 'fsync_makeflow_log'

Requested by Dodi (CRC). This protects the log when the computing node fails
before propagating the changes in AFS.
Use the specified bandwidth as bytes per second.