Update versions for 7.1.0-SNAPSHOT
ISPN-4939 Always include the clean goal as part of the lifecycle of the uberjar builds to avoid stale data
Remove references to old unused profiles in the documentation and the release script
ISPN-4939 fix missing uberjars from distribution zip and add back the extras profile to fix missing source artifacts
ISPN-3938 AdvancedAsyncCacheLoader.process() concurrency issues

Simplify ExecutorAllCompletionService to track the tasks itself instead of
using an ExecutorCompletionService.