Filter out windows images when getting an image to use for tests.

Update AutoScaling tag tests. With image management imaging worker a new tag is introduced to the system.  Scaling tests that depended on only the tags that were created in the test to be present will fail until this change.
Filter out load balancer and image worker images when getting an image to use for tests.

Update AutoScaling tag tests. Handle case where image worker tag is present and adjust verification accordingly. This is a better solution as the test will remain backward compatible and also pass in the case image worker image is not running.
Cleanup boolean logic in EC2ReferenceValidation test
Fix missing braces on else clause when checking if using HVM or para-virt image
Add cancel and cleanup methods for conversion tasks
Update conversion task methods for cancel, update, tracking snapshots, instances, images, and volumes associated with the task
Add argument error for missing url
Remove unused deps
Fix Loadbalancer filter on get_images

Change-Id: I35a75aebb3394df327966e42bcdaf8d256725e8c
Merge branch 'testing' of github.com:eucalyptus/eutester into testing
Merge pull request #284 from euca-nightfury/testing

Fix debug messages and comment out unimplemented s3 compatibility test
Add some S3 tests to CI-run test suite, update wlarus test suite with all Walrus/S3 tests

Comment out getting groovy dependency that was accidentally included with a previous commit.
Merge pull request #281 from tbeckham/testing

Update E4J (stop adding trailing slash)
Add basic import instance tests
Format conversion task status message
Merge branch 'testing' of git.qa1.eucalyptus-systems.com:qa-repos/eutester into testing
Update print conversion task list method
Move some attributes to properties
Format conversion task table
Remove blank lines