minor cleanup of module001-ch004-openstack-architecture

process to processes - number of periodic processes which run on Glance changed

Change-Id: I2cdf0fd21e588efae9f796b4dc2045db21db5caf
module003-ch004-swift-building-blocks cleanup

minor typo chosing to choosing was changed

Change-Id: Id8efea734967a8d9915edb98163218b71c8a0940
Merge "module003-ch004-swift-building-blocks cleanup"