acu99533 empty keyspace fix in with_keyspace()
acu99533 make with_keyspace return block result
acu99533 add feature for checking empty old keyspace
acu99533 additional with_keyspace test case
Merge pull request #6 from rightscale/aqua_13_08_acu99533_fix_with_keyspace

acu99533 empty keyspace fix in with_keyspace()