updating SM features to latest versions
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-stratos
implementing rest of the mock services
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-stratos
refactoring ArtifactUpdatePublisher and adding instance clean up notification event publishing
fix gradient of load average event
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-stratos