added tags to all system tests and changed the way cleanup occurs
execute webhook takes longer to update state
Merge branch 'master' into tags-for-system-tests
scheduler consistency is QUORUM

It is possible that 1 api node deletes event and before it gets propogated to other cass nodes, other
api node picks the same event causing the same policy to get executed twice. So, read and writing at
quorum that guarantees consistency. The slower performance due to this is not really a concern since it
is happening in background.
wrapper for Bobby API.
using get_consistency_level instead of hard-coding
fix tests
Merge branch 'master' into tags-for-system-tests
clean up
added tests for get_consistency_level
pep8 fix
added tags for system update scheduler tests
changed scale up tests to be verified using building servers and scale down tests to verify the server names on tenant at the end of scale down
merge conflict resolved
tag and clean up change for lbaas
adding new links
test fix
test fixes
increasing wait time when verifying deleted servers
wait_for_expected_number_of_active_servers moved to fixtures