Up to 2.0.0-SNAPSHOT after the 1.8.0 release
Updating project and jclouds.version to 2.0.0-SNAPSHOT
JCLOUDS-653: Address Guava 18 deprecations

Mostly renaming Objects.toStringHelper to MoreObjects.toStringHelper.
Remove maven-license-plugin

This never seemed to work and we will enforce license text via
Checkstyle instead.
JCLOUDS-643: Fix Google and OAuth tests