Merge pull request #92 from jclouds/remove-aws

aws labs is now at https://github.com/jclouds/jclouds-labs-aws
FGCP: stop node before trying to destroy it with destroyNode
FGCP: added retry handler to retry errors due to VSYS RECONFIG status,
error handler for other common errors
FGCP: updated OS templates for TemplateBuilderLiveTests (RHEL 5.7/8. 6.3)
FGCP: update/correct preferred image for testing (CentOS 6.2 64 bit)
FGCP: reorganize package structure around compute.config
FGCP: refactor authentication to use FGCPCredentials and pems
FGCP: don't use proxy for ssh connections in live tests when HTTP proxy specified
FGCP: removed async api