Merge tag '3.0.2' into develop

3.0.2
Post Release: Version 3.0.2 -> 3.0.3dev
close connection pool after using it
Merge pull request #16 from zenoss/feature/ZEN-15086

close connection pool after using it
refactored objects.xml with good sequence numbers
Release: Version 3.0.3dev -> 3.0.3.
Document 3.0.3 changes.
Finished release 3.0.3.