version bump after release 1.0.20
Use null journal for running tests. This speeds things up considerably.
CORAL-140: implement equals and hashCode for anonymous Principal
implementation returned by SubjectImpl.getPrincipal()
CORAL-140: use correct time units when setting up session pool
CORAL-140: new default settings for session eviction: check every 15
seconds, retain sessions for 60 seconds, check 25% of existing sessions
on each eviction run, no sessions are retained indefinitely.
CORAL-140: coral sessions pool statistics for Munin
CORAL-140: reverted change of DEFAULT_SESSION_POOL_SIZE_PER_SUBJECT
setting to 0 would effectively disable pooling.
Merge branch 'dev' for release 1.0.20.1