Remove largely unused EC ExceptionList - EUCA-4399

EUCA-4399
Customized PostgreSQLDialect moved to eucalyptus package - EUCA-4287

The customized dialect is moved into a eucalytpus package and modified
to override the format for table truncation.

EUCA-4287
Load balancing refactoring of shared code - EUCA-5931

Load balancing dependencies are moved to shared modules to remove
dependencies between service implementations.

UserMetadata and AccountMetadata entities are moved to the msgs module.

DispatchingClient is moved to msgs module and extraneous subclasses are
removed.

EUCA-5931
Fix HMAC signature URL parameter canonicalization - EUCA-4748

URL parameter canonicalization is updated to not encode ~.

EUCA-4748
Update Jetty config - EUCA-5562

EUCA-5562
Merge remote-tracking branch 'origin/dev/sjones/EUCA-4399' into testing
Merge remote-tracking branch 'origin/dev/sjones/EUCA-4287' into testing
Merge remote-tracking branch 'origin/dev/sjones/EUCA-4748' into testing
Merge remote-tracking branch 'origin/dev/sjones/EUCA-5562' into testing
Merge remote-tracking branch 'origin/dev/sjones/EUCA-5931' into testing