o.c.scan: Manifest requires Java 7
o.c.scan: Scan data log 'last sample' serial

Scan server provides this (again), so clients can use it to determine if
new data needs to be fetched.
o.c.scan: DataLog is Closable
o.c.scan.server: Warning in test, log not closed
o.c.scan: ScanSample toString includes serial

Causes it to show up in data table tool tip, ...
Merge remote-tracking branch 'origin/3.2.x' into 3.2.x